eSignature API for Legally Binding PDF Signatures

The Document Sign API enables businesses to collect legally binding digital signatures on PDF documents. Send documents to up to 4 recipients with interactive visual signature placement, access password security, and automated cloud backup.

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Overview

How Electronic Signatures Work on Documents

Document Sign allows your business to upload PDF contracts, agreements, or forms and send them to one or more signers. Recipients receive secure email invitations with unique signing tokens, verify access passwords, and draw or type their signature on custom coordinate placements. Once all signers complete, signatures are dynamically embedded onto the final PDF.

How the eSignature API Works

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Multi-Signer

Up to 4 Recipients

Collect signatures from up to 4 signers on a single document with unique, time-sensitive token links sent directly via email.

4 Signers

Multi-Party Support

Visual Canvas

Precision Placement

Visually drag and drop signature boxes on document page previews to set exact X/Y coordinates for every recipient.

100%

Placement Precision

Access Control

Password Security

Protect sensitive legal documents with bcrypt-hashed passwords that recipients must verify before accessing or signing.

Bank-Grade

Password Encryption

Document Signing Workflow

Step 01 — Upload & Setup

Upload PDF & Set Access Security

Merchant uploads PDF document, enters a title, sets access password, and configures sign page rules.

  • → Supports standard PDF documents up to 50MB
  • → Set custom bcrypt password required for signer access
  • → Restrict signing to specific pages (e.g., '1,3') or 'ALL'
Step 02 — Visual Placement

Position Signature Fields on PDF Canvas

Add recipient email addresses and drag-and-drop signature placement boxes.

  • → Add up to 4 recipient email addresses per envelope
  • → Interactive drag-and-drop preview canvas per page
  • → Customize signature box width, height, and coordinates
Step 03 — Email Dispatch & Storage

Automated Email Notification ($0.50)

System charges $0.50 credits, securely stores document on S3, and sends unique signing links.

  • → $0.50 credit automatically deducted from balance
  • → Unique, encrypted signing token links emailed to recipients
  • → Document stored in secure S3 storage
Step 04 — Signature & Final Compilation

Recipient Signing & Merged PDF Delivery

Recipients sign via link, and signatures are automatically compiled onto the final document.

  • → Recipients draw or type signature after password validation
  • → Real-time envelope status tracking (PENDING to COMPLETED)
  • → Embedded signatures compiled onto final downloadable PDF

Solutions

Built for your industry

Whether you are onboarding retail investors or verifying dApp users, Verifilite has the right configuration for your compliance needs.

blockchain

Web3 & dApps

Put identity on-chain. Bind wallet addresses to real-world verified identities, gate smart contract access by KYC status, and make sure your token sales and airdrops reach genuine users, not bots or sanctioned wallets.

Crypto Brokers & Exchanges

Verify user identities, screen against OFAC and PEP lists, and accept USDT from customers without holding any private keys. Everything a regulated crypto business needs, without the enterprise price tag or the month-long integration project.

blockchain

Real World Assets (RWA)

Global token investors need fast, verified onboarding. Verifilite handles identity verification, proof of address, and AML checks for investors across 190+ countries, so you can focus on the asset and not the paperwork.

RWA
iGaming & Exports

iGaming & Exports

Verify player ages, confirm identities, and block duplicate or fraudulent accounts in real time. Keep your platform compliant with gaming regulations and your competition fair.

Fintech Solutions

Fintech

Onboard users in seconds, not days. Verifilite automates your entire KYC flow so your compliance team handles exceptions, not routine checks. Meet AML and KYC requirements without slowing down user growth. Works with neobanks, payment apps, lending platforms, and trading apps.

Integration

Integrate in minutes, not months

Drop-in widget, REST API, and SDK. Pick what works for your stack and go live the same day.

Web and Mobile SDK

Easily integrate our verification features into your web and mobile apps using lightweight SDKs with flexible customization options.

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REST API

Full programmatic control over every step of the verification process. Send documents, receive structured results, configure webhooks, and build custom flows for any use case. Sandbox mode available so you can test without going live.

sdk-img

REST API

Full programmatic control over every step of the verification process. Send documents, receive structured results, configure webhooks, and build custom flows for any use case. Sandbox mode available so you can test without going live.

sdk-img

Pricing

Pricing that doesn't punish early-stage companies.

Enterprise KYC providers charge $1 to $2 per verification with high minimum commitments designed for large companies. We built Verifilite so individual developers and growing businesses can access the same quality of AI verification at a price that makes sense at any stage. Start with unlimited free kyc verifications.

Need volume pricing? Talk to Sales.

Frequently asked questions

Explore the most Frequently Asked Questions (FAQs) about KYC, AML legislation, KYB, Affiliate Program, and much more.

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News and Resources

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