This article contains prerelease information. Release dates, features, and other information are subject to change without notice.
Ensure your signed documents pass any regional verification check by removing Acrobat Sign’s Integrity Seal and Locking Signature while preserving full legal validity.
Organizations using Acrobat Sign often submit digitally signed documents to government agencies, banks, or other entities that require validation through third-party verification tools or services. However, certain regional verification tools may not recognize Integrity Seals and Locking signatures, which Acrobat Sign automatically applies to ensure file integrity and origin. This may result in these tools flagging documents as non-conforming or invalid, even if their user signatures are fully conforming and valid.
Integrity Seal Removal provides a solution to organizations facing conformance issues with certain signature verification tools. Removing Integrity Seals and Locking signatures applied by Acrobat Sign ensures that user-applied digital signatures remain fully conforming and valid with regional and local trust requirements, enabling seamless verification by third-party tools.
In addition, this feature allows administrators to optionally remove the Locking Signature to enable complex document workflows that require signed documents to be unlocked for additional processing following the signing workflow with Acrobat Sign. Removing the Integrity Seal and Locking signature applied by Acrobat Sign allows these documents to be processed by third-party tools requiring unprotected and unlocked PDF files.
Configuration
Availability:
- Acrobat Standard and Acrobat Pro: Not Configurable
- Acrobat Sign Solutions: Supported
- Acrobat Sign for Government: Not Supported
Configuration scope:
This feature must be enabled through Acrobat Sign support and can be configured at the account and group level.
How it works
Acrobat Sign Integrity Seal Removal allows customers to:
- Remove Integrity Seals and Locking Signatures from agreements.
- Maintain only user-applied digital signatures to conform to local regulations.
- Ensure full compatibility with third-party signature verification tools.
To maintain document integrity when the Integrity Seal and Locking Signature are removed, Acrobat Sign calculates a fingerprint of the document using the SHA256 hashing function and shows it at the end of the Audit Report. The SHA256 fingerprint allows recipients to verify that the uncertified and unlocked PDF file has not been tampered with after being downloaded from Acrobat Sign.
To verify the document integrity of these documents, users can calculate a fresh SHA256 fingerprint of the PDF file using commonly available tools. If the calculated fingerprint is equal to the document fingerprint shown in the Audit Report, then the document's integrity is verified.
Things to know
- Download and Sign with Acrobat does not support Acrobat Sign Integrity Seal Removal.
- When the Integrity Seal and Locking signatures are removed, the PDF copy of the document can be altered from the authoritative version stored on Acrobat Sign.
- To check the integrity of these documents, recipients should manually calculate a SHA256 fingerprint and compare it with the value available from the Audit Report.
Most Unix-like systems have shasum or sha256sum built in.
Using shasum (bash):
shasum -a 256 filename.ext
- Using sha256sum (bash):
sha256sum filename.ext
This prints the SHA-256 hash for the file. The “fingerprint” is just the hash string.
- PowerShell has Get-FileHash:
Get-FileHash filename.ext -Algorithm SHA256
This outputs the SHA-256 hash in hex format.