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 stamp a PDF on your phone

You can stamp a PDF on your phone without installing anything. Open PDF Verified in your mobile browser on an iPhone or Android, design a stamp (or upload a transparent PNG of an existing one), upload your PDF, place the stamp with your finger, and download the stamped file. Designing is free; a stamp download is $1.50 pay-as-you-go or free on a plan.

Stamp a PDF on your phone →

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

Open the stamp maker in your phone browser — On iPhone or Android, go to the PDF Verified stamp maker in Safari or Chrome — no app to install.
Design or upload your stamp — Build a seal or text stamp, or upload a transparent PNG of your existing stamp. Add a date or serial if needed.
Place it on the PDF and download — Upload the PDF, drag the stamp into position with your finger, resize it, and download the stamped file.

What you get

Works on iPhone and Android — no app needed.
Design, upload, place and download entirely on your phone.
Transparent PNG stamps that sit cleanly over any background.
Optional serial number and QR verification.
Free to design; $1.50 per stamp download or free on a plan.

Frequently asked questions

How do I stamp a PDF on my iPhone?

Open the PDF Verified stamp maker in Safari, design or upload your stamp, upload the PDF, place the stamp with your finger, and download the stamped file — no app required.

How do I add a stamp to a PDF on Android?

Open the stamp maker in Chrome, build or upload a stamp, place it on your PDF, and download. Everything runs in the mobile browser.

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

No. It works entirely in the mobile browser, so there is nothing to install.

Can I stamp and download on the same phone?

Yes. Design, place and download the stamped PDF all on your phone, then share it from the browser.

Is the phone-stamped PDF verifiable?

Yes. Turn on serialization and the stamp carries a serial and a public QR verification link, the same as on desktop.