Digital Signatures legally binding & court-proof
Get contracts and documents digitally signed – with forensic audit trail, SMS-OTP verification and GPS location proof. From €0.99 per signature, no subscription needed.
Digital signatures at the fairest price
While other providers charge monthly subscriptions, PaperOffice charges only per signature – no minimum contract.
Included in every signature
How it works
Upload
Upload PDF or document to PaperOffice
Choose Recipients
Send via email, SMS, link or QR code
Get it Signed
Recipients verify via SMS-OTP and sign
Every signature is protected with a forensic audit trail that goes far beyond industry standard. No other provider offers this level of detail.
PaperOffice Sign is different
Enterprise features at pay-per-use pricing – without the enterprise complexity.
QR Code → Smartphone as Signature Pad
Scan the QR code and use your smartphone as a signature pad. Live status on desktop in real-time.
GPS Location Proof (Mandatory)
For mobile signatures, GPS location is captured and documented in the certificate with map and address.
VPN & Proxy Detection
IP2Location detects VPN, proxy and datacenter IPs. Manipulation attempts are logged in the audit trail.
On-the-fly Certificates in 8 Languages
Every signature receives a legally valid certificate with all audit data – automatically in the signer's language.
Sequential or Parallel
Multiple signers in parallel or in a defined order via drag & drop.
Smart Auto-Reminders
Configurable reminders via email & SMS with time window (09:00–20:00). Escalation after last reminder.
Relations AI Integration
Import contacts directly from your CRM. Name, email, phone and role are automatically filled in.
Document Verification
Any signed PDF can be verified against the database at any time – SHA-256 hash comparison in seconds.
Real-Time Live Status (SSE)
With QR code signatures, see every step of the signer live on your desktop – via Server-Sent Events in real-time, no page reload needed.
3 Signature Input Methods
Sign by finger on touchscreen, by mouse drawing on desktop, or by uploading a signature image – flexible for every situation.
No Account Required for Signers
Recipients don't need a PaperOffice account. Simply open the link, enter SMS-OTP and sign – maximum conversion without barriers.
Everything for professional digital signatures
From simple signatures to complex multi-party workflows.
Multi-Party Signing
Unlimited recipients per request
4 Delivery Channels
Email, SMS, link or QR code
6 Message Templates
Contract, approval, offer, agreement, urgent, form
Validity Period
Presets: 7, 14 or 30 days + custom
Mobile Optimized
PDF as WebP images, pinch-to-zoom, touch signature
Mandatory Document View
Recipient must read & confirm document
Status Dashboard
Real-time overview of all signature requests
Signature Timeline
Detailed history with relative timestamps
Why PaperOffice Sign?
A direct comparison with conventional electronic signature providers.
Handwritten
- No audit trail
- No identity verification
- Can be forged
- Paper & postage required
- Days to weeks
- No location data
Typical electronic signature providers
- Basic audit trail
- Email verification
- SMS-OTP only in premium plan
- Monthly subscription required
- Limited signatures/month
- No GPS location
PaperOffice Sign
- Forensic audit trail (15+ checks)
- SMS-OTP mandatory (included)
- VPN & Proxy detection
- Pay-per-use, no subscription needed
- Unlimited signatures
- GPS location + map in certificate
From Upload to Certificate
A transparent process that guarantees maximum legal validity.
Upload Document & Choose Recipients
Upload your document and add recipients. Choose between email, SMS, direct link or QR code. Set order, validity and reminders.
SMS-OTP Identity Verification
The recipient receives a 6-digit code via SMS. Verification is mandatory – no signature without proven identity. Valid for maximum 10 minutes.
Review Document & Confirm
Before signing, the document must be fully read. An explicit confirmation via checkbox is required. On mobile devices, GPS location is additionally captured.
Sign Digitally
Sign via touch, mouse or upload. Simultaneously, device fingerprint, IP address, browser profile and optional geolocation are captured.
Certificate & Signed Document
After completion, a legally valid certificate is generated and merged with the original PDF. Contains all audit data, map screenshot and integrity hash.
The signature certificate contains
Digital signatures for every need
From employment contracts to privacy statements – PaperOffice Sign covers all document types.
Contracts & Agreements
Purchase, rental, service contracts
Employment & HR
Onboarding, NDAs, salary agreements
Proposals & Orders
Get quotes confirmed by customers
Approvals & Authorizations
Budget, project and invoice approvals
NDAs & Confidentiality
Non-disclosure agreements digitally
Rental & Real Estate
Lease agreements, handover protocols
Invoices & Finance
Invoice approval, payment instructions
Privacy & Compliance
DPA, consent forms, privacy statements
Healthcare
Patient consent, treatment contracts
Banking & Insurance
Account opening, policies, claims
PaperOffice Sign API
31 REST endpoints for complete signature automation. Start in 5 minutes.
$ curl -X POST \
https://api.paperoffice.ai/v2/signature_link/create_and_send \
-H "Authorization: Bearer $API_KEY" \
-H "Content-Type: application/json" \
-d '{"document_pofid":"DOC_123","signers":[{"name":"John Smith","email":"john@company.com","phone":"+4917612345678"}],"channel":"email","message":"Please sign this contract."}' Key Endpoints
/signature_link/create_and_send Create request & send /signature_link/sign Sign document /signature_link/check_status Query status /signature_link/certificate Get certificate /signature_link/verify_document Verify signature /signature_link/send_reminder Send reminder Enterprise security as standard
Your documents and signatures are protected with the highest security standards.
eIDAS SES Compliant
Meets EU Regulation 910/2014 for simple electronic signatures with enhanced legal validity through SMS-OTP.
GDPR Compliant
Data processing exclusively in EU data centers. No third-party cloud, no US servers.
256-Bit AES Encryption
End-to-end encrypted transmission and storage of all documents and signature data.
EU Datacenter
Own data center in the EU. Triple redundant, 100% green energy, 100% uptime.
Frequently Asked Questions
Yes. PaperOffice Sign meets the requirements of EU Regulation 910/2014 (eIDAS) for simple electronic signatures (SES). Through mandatory SMS-OTP verification, the forensic audit trail with VPN detection and GPS location proof, our signatures achieve particularly high legal validity in court.
Before a recipient can sign, they receive a 6-digit one-time code via SMS to their verified mobile number. This code is valid for 10 minutes and must be entered correctly. Without SMS verification, no signature is possible – this is mandatory at PaperOffice Sign, not optional.
Each signature uses transparent pay-per-use credits — no monthly subscription and no minimum contract. Even free users can use signatures when credits are available. See the pricing section for current rates in your currency.
Every signature is protected with over 15 security checks: SMS-OTP verification, device fingerprint (SHA-256), IP address with ISP identification, VPN/proxy/datacenter detection, GPS coordinates with reverse geocoding, browser profile and a chronological action log. All this data flows into the signature certificate.
Select 'QR Code' as the delivery method. A QR code is displayed that the recipient scans with their smartphone. On the desktop, you see real-time progress: Connected → OTP verified → Document read → Location captured → Signed. The signature preview appears live on your screen.
Yes, you can add any number of recipients. Choose between parallel signing (all at once) or sequential signing (in a defined order). Set the order via drag & drop. Each recipient goes through the complete verification process.
For mobile signatures (QR code), the signer's GPS location is captured and documented in the certificate with a Leaflet map. This significantly increases legal validity: it can be proven where the signature was made. Accuracy is displayed (<100m = accurate, <500m = medium).
The certificate contains: document info with SHA-256 hash, signer details (name, email, phone, role), GPS coordinates with map screenshot and address, network data (IP, ISP, VPN status), device fingerprint, SMS verification details, chronological audit trail and an eIDAS compliance statement. It is generated as PDF and merged with the original document.
Yes. Upload the signed PDF and PaperOffice checks the SHA-256 hash against the database. This way you can prove the authenticity and integrity of a signed document at any time. The cost of verification is borne by the issuer of the signature.
PaperOffice Sign implements Simple Electronic Signatures (SES) according to EU Regulation 910/2014. Through mandatory SMS-OTP verification, the forensic audit trail and GPS location capture, we achieve an 'Advanced SES' with particularly high legal validity – comparable to advanced electronic signatures.
Customer Success Stories
Discover how businesses transformed their processes with PaperOffice AI.
Kumul Minerals Holdings Limited
Enterprise document management for all our mining operations. World class.
The Challenge Printing Company Inc.
FDA-regulated pharmaceutical labels require seamless documentation. PaperOffice has reduced our approval process from days to hours.
K60-Gitterrostsysteme GmbH & Co. KG
Technical documentation and order processing now run fully automatically.
Ayuntamiento de Carrión de los Condes
Digitization has revolutionized our administration. Citizen inquiries are now processed in minutes instead of days.
Kardiologie Waldstrasse
Patient records, medical reports, and referrals are automatically captured and classified. Our practice team finally has time for their patients.
Okada Manila
8,000 employees and thousands of guest documents every day. PaperOffice has completely digitized our back-office processes.
PT Bank BPD DIY
Loan applications and compliance documents are now processed in minutes instead of hours. The regulatory review is fully automated.
IDC Construcción
Construction project documentation and compliance are now digital and traceable.
The Palms Beach Hotel & Spa
Check-in forms, invoices, and guest communications are fully digital. Our concierge team now focuses on providing excellent service.
Q1 Energie AG
Gas station billing, supplier documents, and compliance records from over 250 stations are automatically processed and archived.
Schreiner MediPharm GmbH & Co. KG
GMP-compliant documentation for pharmaceutical functional labels is now fully automated. Audit trails are seamless and instantly accessible.
Baufritz GmbH & Co. KG
Blueprints, permits, and customer files for our wooden houses are now managed centrally. After six generations, we are finally paperless.
Roastmarket GmbH
Supplier contracts, certificates, and customs papers for hundreds of roasteries worldwide are automatically captured and assigned to the correct product.
Streck Transport GmbH
Temperature logs, CMR waybills, and food certificates are automatically scanned and assigned to the order. Misallocations are a thing of the past.
Nosta Group GmbH
Heavy transport permits, route plans, and project documentation are now instantly accessible digitally. No more searching through folders.
Lagermax Lagerhaus und Speditions AG
Customs documents, warehouse receipts, and shipping orders for our Eastern European network are automatically classified. Four generations of logistics, finally digital.
Marzek Etiketten+Packaging GmbH
Printing specifications, customer approvals, and material certificates are now accessible centrally. The production error rate has dropped to near zero.
Permapack AG
Sustainability certificates, supplier contracts, and customer specifications are processed automatically. Swiss precision, now also digital.
Nordlin Ehitus OÜ
Building permits, subcontractor contracts, and acceptance protocols for our commercial properties are now fully documented digitally.
Uus Maa Kinnisvarabüroo OÜ
Purchase agreements, exposés, and customer files from over 30 years of market leadership are now digitally searchable. Every agent finds everything in seconds.
CF&S Estonia OÜ
Ocean freight documents, customs declarations, and bills of lading are automatically captured. Baltic Sea logistics has never been so efficient.
Packhelp Sp. z o.o.
Thousands of custom packaging orders per week, including design approvals, print data, and delivery documents. PaperOffice keeps it all together.
Sakura Finetek Japan Co., Ltd.
Pathology lab documentation and device certifications are now fully automated. Seamless traceability for every specimen.
Johnan Shinkin Bank
Loan documents, security papers, and customer correspondence are processed in minutes instead of hours. The regulatory review is seamless.
Yamato Kogyo Co., Ltd.
Technical specifications, quality certificates, and recycling protocols for our steel production are central and instantly accessible.
IL Kwang Label Co., Ltd.
Pharma and cosmetic label specifications with regulatory requirements are automatically checked and approved. No more manual checklists.
Endowus Pte. Ltd.
KYC documents, investment reports, and regulatory filings are classified in seconds. As an MAS-regulated robo-advisor, seamless compliance is essential.
Freight Links Express Holdings Ltd.
Safety data sheets, transport permits, and ADR documents for chemical logistics are automatically assigned. Zero tolerance for errors.
Selberan Sdn Bhd
Certificates of authenticity, supplier records, and customer warranties for our pearl collections are automatically archived and instantly accessible.
Kiatnakin Phatra Bank PCL
SME loan applications, security documents, and regulatory reports are automatically classified. Our advisors have more time for customer consulting.
Hatton National Bank PLC
Customer files from over 135 years of banking history are being successively digitized. 5,000 employees now have instant access to all documents.
BRAC Bank PLC
Microcredit applications and compliance documents for millions of customers are now processed in minutes instead of days. A game changer for financial inclusion.
Scommerce JSC (Giao Hàng Nhanh)
Hundreds of thousands of delivery notes and return slips per day are processed automatically. Vietnam's leading e-commerce logistics provider, now paperless.
Gulf Metal Industries LLC
CNC manufacturing protocols, material certificates, and customer specifications for oil, gas, and aerospace projects are now fully documented digitally.
Elm Company
Vision 2030 requires complete digitization. PaperOffice processes government documents for Saudi Arabia's digital backbone.
Bisalloy Steels Pty Ltd
Material certificates, hardening protocols, and customer specifications are automatically assigned to the correct order. Australia's only Q&T manufacturer, now paperless.
Pacific Steel Fabrications Ltd.
Weld seam protocols, structural calculations, and project plans are managed digitally. Our workshop teams have access in real time.
Maple Precision Metalworks Ltd.
Aerospace certificates, CNC programs, and customer tolerances are automatically classified. AS9100 compliance has never been easier.
Clip SA de CV
Merchant contracts, KYC documents, and transaction receipts for hundreds of thousands of SMEs are processed in seconds. Mexico's payment revolution, paperless.
Bodega Catena Zapata
Harvest documentation, export certificates, and quality protocols for our high-altitude Malbecs are automatically archived. 120 years of winemaking tradition, now digital.
Ualá
Millions of user verifications and regulatory documents are processed fully automatically. Scaling without paper.
Yoco Technologies (Pty) Ltd
Merchant onboarding documents and compliance records for Africa's leading payment provider are processed in minutes instead of days.
Faithful to Nature (Pty) Ltd
Organic certificates, supplier audits, and product labels for thousands of natural products are automatically checked and archived.
Flutterwave Inc.
Regulatory documents from 33 African countries, partner contracts, and audit trails are managed fully automatically. An enterprise DMS for a $3 billion fintech.
HealthInLoc Apotheke Lissabon
Prescriptions and medication management now run fully automatically. More time for our patients.
Patriarchat Lissabon
Centuries-old documents are now digitally searchable. A milestone for our historical archives.
Seniorenresidenz am Park
Our caregivers finally have more time for residents instead of paperwork.
Baldwin County Sheriff's Office
500,000+ records digitized. Our deputies now find all information instantly.
Via Creative Leipzig
Patient records management is now a breeze. Everything automatically captured and archived.
Naslednik Serbien
Inheritance and estate documentation is now efficient and error-free.
El Guijo Hausverwaltung Madrid
Digital property management for all our residential complexes. Tenants and owners are thrilled.
Ritter Verpackungen
With PaperOffice, we have accelerated our invoice processing by 99%. The AI automatically recognizes all relevant data and assigns it correctly.
Herrmann Handwerk
PaperOffice has become indispensable to our daily work. Orders, quotes, and invoices are now automated.
Hartung Pflegedienst
The documentation of our care services is now digital and automated. More time for our patients.
Doratec Maschinenbau
Technical drawings, bills of materials, and quality protocols are instantly searchable. A search that used to take 30 minutes now takes 30 seconds.
Cebras Steuerberatung
Client receipts, tax assessments, and annual financial statements are automatically sorted and assigned to the correct client. Receipt chaos is a thing of the past.
Butterfly IT Consulting
Project documentation, SLAs, and customer communication for our IT consulting projects are automatically classified and archived.
Measurable customer success
Kumul Minerals Holdings Limited
The Challenge Printing Company Inc.
K60-Gitterrostsysteme GmbH & Co. KG
Ayuntamiento de Carrión de los Condes"Enterprise document management for all our mining operations. World class."
Operations Director, Kumul Minerals Holdings Limited "FDA-regulated pharmaceutical labels require seamless documentation. PaperOffice has reduced our approval process from days to hours."
VP Operations, The Challenge Printing Company Inc. "Technical documentation and order processing now run fully automatically."
CEO, K60-Gitterrostsysteme GmbH & Co. KG "Digitization has revolutionized our administration. Citizen inquiries are now processed in minutes instead of days."
Administration Manager, Ayuntamiento de Carrión de los Condes "Patient records, medical reports, and referrals are automatically captured and classified. Our practice team finally has time for their patients."
Cardiologist, Kardiologie Waldstrasse "8,000 employees and thousands of guest documents every day. PaperOffice has completely digitized our back-office processes."
Director of Operations, Okada Manila "Loan applications and compliance documents are now processed in minutes instead of hours. The regulatory review is fully automated."
Head of Digital Banking, PT Bank BPD DIY "Construction project documentation and compliance are now digital and traceable."
Project Manager, IDC Construcción "Check-in forms, invoices, and guest communications are fully digital. Our concierge team now focuses on providing excellent service."
General Manager, The Palms Beach Hotel & Spa "Gas station billing, supplier documents, and compliance records from over 250 stations are automatically processed and archived."
Head of Finance, Q1 Energie AG "GMP-compliant documentation for pharmaceutical functional labels is now fully automated. Audit trails are seamless and instantly accessible."
Head of Quality Management, Schreiner MediPharm GmbH & Co. KG "Blueprints, permits, and customer files for our wooden houses are now managed centrally. After six generations, we are finally paperless."
Managing Director, Baufritz GmbH & Co. KG "Supplier contracts, certificates, and customs papers for hundreds of roasteries worldwide are automatically captured and assigned to the correct product."
COO, Roastmarket GmbH "Temperature logs, CMR waybills, and food certificates are automatically scanned and assigned to the order. Misallocations are a thing of the past."
CEO, Streck Transport GmbH "Heavy transport permits, route plans, and project documentation are now instantly accessible digitally. No more searching through folders."
Head of Project Logistics, Nosta Group GmbH "Customs documents, warehouse receipts, and shipping orders for our Eastern European network are automatically classified. Four generations of logistics, finally digital."
Board Member Logistics, Lagermax Lagerhaus und Speditions AG "Printing specifications, customer approvals, and material certificates are now accessible centrally. The production error rate has dropped to near zero."
CEO, Marzek Etiketten+Packaging GmbH "Sustainability certificates, supplier contracts, and customer specifications are processed automatically. Swiss precision, now also digital."
CEO, Permapack AG "Building permits, subcontractor contracts, and acceptance protocols for our commercial properties are now fully documented digitally."
Project Director, Nordlin Ehitus OÜ "Purchase agreements, exposés, and customer files from over 30 years of market leadership are now digitally searchable. Every agent finds everything in seconds."
CEO, Uus Maa Kinnisvarabüroo OÜ "Ocean freight documents, customs declarations, and bills of lading are automatically captured. Baltic Sea logistics has never been so efficient."
Managing Director, CF&S Estonia OÜ "Thousands of custom packaging orders per week, including design approvals, print data, and delivery documents. PaperOffice keeps it all together."
CTO, Packhelp Sp. z o.o. "Pathology lab documentation and device certifications are now fully automated. Seamless traceability for every specimen."
Director Quality Assurance, Sakura Finetek Japan Co., Ltd. "Loan documents, security papers, and customer correspondence are processed in minutes instead of hours. The regulatory review is seamless."
Head of Operations, Johnan Shinkin Bank "Technical specifications, quality certificates, and recycling protocols for our steel production are central and instantly accessible."
Director of Production, Yamato Kogyo Co., Ltd. "Pharma and cosmetic label specifications with regulatory requirements are automatically checked and approved. No more manual checklists."
Head of Quality, IL Kwang Label Co., Ltd. "KYC documents, investment reports, and regulatory filings are classified in seconds. As an MAS-regulated robo-advisor, seamless compliance is essential."
CTO, Endowus Pte. Ltd. "Safety data sheets, transport permits, and ADR documents for chemical logistics are automatically assigned. Zero tolerance for errors."
Director Logistics, Freight Links Express Holdings Ltd. "Certificates of authenticity, supplier records, and customer warranties for our pearl collections are automatically archived and instantly accessible."
Managing Director, Selberan Sdn Bhd "SME loan applications, security documents, and regulatory reports are automatically classified. Our advisors have more time for customer consulting."
Head of Digital Operations, Kiatnakin Phatra Bank PCL "Customer files from over 135 years of banking history are being successively digitized. 5,000 employees now have instant access to all documents."
Chief Digital Officer, Hatton National Bank PLC "Microcredit applications and compliance documents for millions of customers are now processed in minutes instead of days. A game changer for financial inclusion."
Head of Technology, BRAC Bank PLC "Hundreds of thousands of delivery notes and return slips per day are processed automatically. Vietnam's leading e-commerce logistics provider, now paperless."
VP Technology, Scommerce JSC (Giao Hàng Nhanh) "CNC manufacturing protocols, material certificates, and customer specifications for oil, gas, and aerospace projects are now fully documented digitally."
Operations Manager, Gulf Metal Industries LLC "Vision 2030 requires complete digitization. PaperOffice processes government documents for Saudi Arabia's digital backbone."
VP Digital Transformation, Elm Company "Material certificates, hardening protocols, and customer specifications are automatically assigned to the correct order. Australia's only Q&T manufacturer, now paperless."
Quality Assurance Manager, Bisalloy Steels Pty Ltd "Weld seam protocols, structural calculations, and project plans are managed digitally. Our workshop teams have access in real time."
General Manager, Pacific Steel Fabrications Ltd. "Aerospace certificates, CNC programs, and customer tolerances are automatically classified. AS9100 compliance has never been easier."
Director of Engineering, Maple Precision Metalworks Ltd. "Merchant contracts, KYC documents, and transaction receipts for hundreds of thousands of SMEs are processed in seconds. Mexico's payment revolution, paperless."
CTO, Clip SA de CV "Harvest documentation, export certificates, and quality protocols for our high-altitude Malbecs are automatically archived. 120 years of winemaking tradition, now digital."
Managing Director, Bodega Catena Zapata "Millions of user verifications and regulatory documents are processed fully automatically. Scaling without paper."
CTO, Ualá "Merchant onboarding documents and compliance records for Africa's leading payment provider are processed in minutes instead of days."
CEO, Yoco Technologies (Pty) Ltd "Organic certificates, supplier audits, and product labels for thousands of natural products are automatically checked and archived."
Operations Director, Faithful to Nature (Pty) Ltd "Regulatory documents from 33 African countries, partner contracts, and audit trails are managed fully automatically. An enterprise DMS for a $3 billion fintech."
CTO, Flutterwave Inc. "Prescriptions and medication management now run fully automatically. More time for our patients."
Pharmacy Director, HealthInLoc Apotheke Lissabon "Centuries-old documents are now digitally searchable. A milestone for our historical archives."
Archive Director, Patriarchat Lissabon "Our caregivers finally have more time for residents instead of paperwork."
Care Services Director, Seniorenresidenz am Park "500,000+ records digitized. Our deputies now find all information instantly."
Sheriff, Baldwin County Sheriff's Office "Patient records management is now a breeze. Everything automatically captured and archived."
Practice Manager, Via Creative Leipzig "Inheritance and estate documentation is now efficient and error-free."
CEO, Naslednik Serbien "Digital property management for all our residential complexes. Tenants and owners are thrilled."
Administration Manager, El Guijo Hausverwaltung Madrid "With PaperOffice, we have accelerated our invoice processing by 99%. The AI automatically recognizes all relevant data and assigns it correctly."
CEO, Ritter Verpackungen "PaperOffice has become indispensable to our daily work. Orders, quotes, and invoices are now automated."
Owner, Herrmann Handwerk "The documentation of our care services is now digital and automated. More time for our patients."
Care Services Director, Hartung Pflegedienst "Technical drawings, bills of materials, and quality protocols are instantly searchable. A search that used to take 30 minutes now takes 30 seconds."
Technical Director, Doratec Maschinenbau "Client receipts, tax assessments, and annual financial statements are automatically sorted and assigned to the correct client. Receipt chaos is a thing of the past."
Tax Advisor, Cebras Steuerberatung "Project documentation, SLAs, and customer communication for our IT consulting projects are automatically classified and archived."
Managing Partner, Butterfly IT Consulting Ready for legally binding digital signatures?
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