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Client approves
Name, designation, signature, IP, and the approved version are captured in the approval history.
Stop relying on screenshots and email trails. Approvallo seals every approval with SHA-256 fingerprints and an HMAC integrity seal — so you can prove what was approved, when, and by whom, and catch any later tampering.
Informal “looks good” emails are easy to challenge. A sealed approval turns sign-off into durable evidence — protecting studios, agencies, and in-house teams alike.
Teams with sealed, verifiable approvals face far fewer “we never signed that” conflicts.
What verification returns when records and files are intact — or when something changed.
Minutes spent gathering evidence when a client or stakeholder challenges a past sign-off.
Simple for your team. Cryptographically strong for audits, legal, and client trust.
Name, designation, signature, IP, and the approved version are captured in the approval history.
We compute a SHA-256 hash of the exact design file bytes that were signed off — not a screenshot.
Review ID, version, hashes, approver, timestamp, actor, and IP are bound with HMAC-SHA256 into an approval_seal.
Open the certificate verify URL. If metadata or the file no longer matches, the status flips to tampered or file changed.
reviewId | versionNumber | fileHash | approverName | designation | signatureHash | sealedAt(UTC) | actorId | ipAddress → HMAC-SHA256(payload, seal_key)
Verification doesn’t just say “valid” or “invalid” — it tells you exactly what broke trust.
Approval metadata matches the seal and the current file still matches the stored SHA-256 fingerprint.
Someone altered approval fields (name, time, IP, signature hash, etc.). The HMAC no longer matches.
The approval record is intact, but the design bytes no longer match what was approved.
The seal verifies, but the approved version file is no longer available to re-hash.
PDF certificates surface integrity status, certificate UUID, file hash, and a public verify link — not just a pretty stamp.
When a campaign ships, you keep a sealed audit trail of who approved which version — ending endless revision debates.
Share a verify URL with legal, brand, or procurement. They see the same integrity result you do — no special software required.
Digital Approval Seal is available on higher plans so studios that need audit-grade proof get it when they’re ready.
Start free, then unlock Digital Approval Seal on plans built for established studios and enterprises.
14-day trial · Cancel anytime · No credit card required