Is PDF Verified legally binding?

Yes. PDF Verified signatures comply with the US ESIGN Act, UETA, EU eIDAS regulation, and equivalent eSignature laws in 190+ countries. Every signed document includes a cryptographic SHA-256 fingerprint and a complete audit trail with timestamps and signer hash chain — admissible in court.

How is PDF Verified different from DocuSign?

PDF Verified offers unlimited documents on the $15 Business plan with REST API included. DocuSign charges $40+/user for Business and gates the API behind a $720/month add-on. PDF Verified also includes unique features: public QR verification page on every signed PDF, eStamp designer, AI field auto-detection, and mobile-first signing without requiring an app.

Can I use PDF Verified without a subscription?

Yes. The pay-as-you-go option lets you sign or send one document or envelope for $1.50 without a monthly subscription. Monthly paid plans include a 7-day free trial.

Which file types can I sign with PDF Verified?

Upload PDF, DOCX, TXT, PNG or JPG files. Non-PDF formats are automatically converted to PDF on upload so signers always receive a clean signing-ready document.

How do recipients verify a signed document is authentic?

Every signed PDF includes a QR code on every page. Anyone — even without a PDF Verified account — can scan it to land on a public verification page showing the document status, completion date, SHA-256 fingerprint, and tamper-evidence proof.

Does PDF Verified work on mobile?

Yes — PDF Verified is mobile-first by design. The signing portal uses a native bottom-sheet pattern with touch-optimized canvas signing, sticky CTAs in the thumb zone, and 44px+ touch targets following Apple Human Interface Guidelines. No app download required.

Can I add a company stamp or seal to a document?

Yes. PDF Verified includes a stamp designer for company seals, official seals, approval stamps (APPROVED, PAID, RECEIVED), date stamps, and certified-true-copy marks. Place a stamp on any document like a signature field. On Business plans, the verified stamp library adds auto-incrementing serial numbers, locked metadata, workspace sharing, revocation, and a public QR verification link for every stamp applied.

How do I verify a stamp is genuine?

Each stamp PDF Verified applies mints a unique verification token at /verify-stamp/:token. Scan the stamp's QR code or open the link from the document's audit certificate to see the stamp's name, serial number, the document it was applied to, and whether it has been revoked — so anyone can confirm a company seal or approval stamp is authentic and current.

How do I verify a signature on a PDF is real?

Open the verification page at pdfverified.com/verify and scan the QR code on the signed PDF, paste the verification code, or upload the file. PDF Verified recomputes the document's SHA-256 fingerprint and compares it against the sealed value — if a single byte changed since signing, verification fails. You also see every signer, their timestamps, and the full tamper-evident audit trail. No account is required to verify.

How do I add a digital stamp to a PDF online?

Upload your PDF, open the editor, add a Stamp field, and pick a stamp from your library — a company seal, an APPROVED or PAID approval stamp, a date stamp, or a certified-true-copy mark. The stamp is baked into the sealed PDF with an optional auto-incrementing serial number and a QR code that links to its public verification page. No printer, ink pad, or scanner needed.

Can PDF Verified check if a PDF has been edited?

Yes. PDF Verified can recompute the SHA-256 fingerprint of a signed PDF and compare it with the fingerprint sealed at completion. If the file was edited after signing, the fingerprint changes and verification fails.

Does PDF Verified include a certificate of completion?

Yes. Completed documents include an audit certificate, also called a certificate of completion, with signer identities, timestamps, IP records, document fingerprint, verification status, and the event history needed for legal review.

Does PDF Verified include an eSignature API?

Yes. Business plans include a REST API and webhooks for sending documents, embedding signing, applying stamps, checking status, and building automated signing workflows.

Can I create a company chop or official seal online?

Yes. PDF Verified includes editable company seal, company chop, official seal, date stamp, and approval stamp templates. Verified stamps can include serial numbers, locked metadata, revocation, and a public QR verification page.

What is the best DocuSign alternative for stamps, seals, and verification?

PDF Verified is built for teams that need more than basic eSignature: public QR verification, PDF authenticity checks, serialized stamps, company seals, audit certificates, and pay-as-you-go signing from $1.50.

How to sign a PDF on your phone

You can sign a PDF on your phone without installing anything. Open Quick Sign in your mobile browser on an iPhone or Android, upload the PDF, sign it with your finger, and download the signed copy. It is free to start, needs no app and no account, and the signed file is legally binding with a tamper-evident SHA-256 seal and a public QR verification link.

Sign a PDF on your phone →

How to sign a PDF on your phone — step by step

Open Quick Sign in your phone browser — On your iPhone or Android, go to Quick Sign in Safari or Chrome and upload the PDF. There is no app to download.
Sign with your finger — Draw your signature with your fingertip, or type your name in a handwriting font. Place it, plus a date or initials, exactly where it belongs.
Download or share the signed PDF — Download the signed, sealed PDF to your phone, or share it straight from the browser.

What you get

Works on iPhone and Android — no app to install.
Sign with your finger or a stylus.
Free to start, no account needed.
Legally binding with a tamper-evident SHA-256 seal.
Download or share the signed PDF directly from your phone.

Frequently asked questions

How do I sign a PDF on my iPhone?

Open PDF Verified Quick Sign in Safari, upload the PDF, draw your signature with your finger, place it, and download the signed file. No app, no account needed to start.

How do I sign a PDF on Android?

Open Quick Sign in Chrome, upload the PDF, sign with your finger or a stylus, and download the signed copy. It runs entirely in the browser.

Do I need an app to sign a PDF on my phone?

No. Everything happens in the mobile browser, so there is nothing to install or sign up for to get started.

Is a signature I add on my phone legally binding?

Yes. A finger-drawn or typed signature is legally binding under ESIGN, UETA and eIDAS. PDF Verified also seals the file so it can be verified later.

Can I share the signed PDF from my phone?

Yes. After signing you can download the signed PDF or share it directly using your phone’s share sheet.