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.

Document fraud prevention: tamper-proof signatures & verifiable stamps

Document forgery jumped 244% last year and identity-fraud losses topped $50 billion. PDF Verified makes every signed document fraud-resistant by design — cryptographically sealed, publicly verifiable by QR, and backed by a tamper-evident audit trail and serialized, revocable stamps. If a single character changes after signing, verification fails.

The four layers of tamper-evidence

Cryptographic seal (SHA-256) — the hash breaks on any change, proving integrity.
Public QR verification — a no-login page shows status, hash, signers, and stamp validity.
Serialized, revocable stamps & seals — unique token + serial per use exposes reuse; revoke to withdraw trust.
Tamper-evident audit trail — who signed, when, from what IP and device; append-only chain of custody.

How verification works

Seal at signing. A SHA-256 fingerprint of the exact content is computed and a tamper-evident seal mark is stamped.
Publish a verification record. A public QR-linked page is created with the hash, signers, timestamps, and any serialized stamps.
Anyone verifies in seconds. A recipient scans the QR to confirm the document is genuine and unaltered and that stamps are valid.

Built for high-fraud, high-trust documents

Contracts, invoices, prescriptions, certified true copies, title deeds, affidavits, bank letters and company resolutions — anywhere a forged document or fake stamp causes real loss. Compliant with ESIGN, UETA and eIDAS.

Frequently asked questions

How do you prevent document fraud and forgery?

PDF Verified prevents document fraud with four layers: a SHA-256 cryptographic hash that breaks if a single character changes, a public QR verification page on every signed document, serialized stamps and seals that are independently verifiable and revocable, and a tamper-evident audit trail recording who signed, when, from what IP and device. Any alteration after signing is immediately detectable.

How can I verify a document is genuine and not altered?

Scan the QR code on the signed PDF (or open its /verify link). The public verification page shows the document status, the SHA-256 fingerprint, the signer list and timestamps, and whether any applied stamp has been revoked — so anyone, with no account, can confirm the document is authentic and unmodified.

How do you detect a forged or altered PDF?

Each sealed document is fingerprinted with SHA-256 at signing. Re-hashing the file and comparing it to the value on the public verification record reveals any change — even one byte — because the hash will not match.

How do you stop signature forgery?

Signatures are captured with intent, timestamp, IP and device, then bound to the document by the hash and stored in an append-only audit trail, so a copy-pasted signature fails verification.

How do you prevent stamp and company-seal fraud?

Every stamp applied through PDF Verified mints a unique verification token and optional serial number; scanning confirms it is genuine, shows its document, and reveals if it has been revoked — exposing photographed or reused stamps.

Is a PDF Verified document admissible as evidence?

Yes. PDF Verified complies with ESIGN, UETA and EU eIDAS; the SHA-256 seal, audit trail, and certificate of completion provide tamper-evidence and chain of custody to support admissibility in most jurisdictions.