Adobe Reader or Acrobat displays a At least one signature has problems message when signed PDF is opened - Foxit PDF SDK

Adding the certificate that was used to apply the digital signature into Adobe's list of Trusted Identities by some easy steps.

Unable to Sign Document Even though Signing Security Permissions Are Allowed – Help Center

How to fix the error 'Adobe Reader could not open because it's either not a supported format or has been damaged' - Quora

Adobe Acrobat Reader: Edit PDF on the App Store

How to fix the error 'Adobe Reader could not open because it's either not a supported format or has been damaged' - Quora

How do I Resolve the At least one signature has problems error in Adobe Reader? – Addo Sign Support

Pros and Cons of Adobe Acrobat 2024

How do I Resolve the At least one signature has problems error in Adobe Reader? – Addo Sign Support

How do I Resolve the At least one signature has problems error in Adobe Reader? – Addo Sign Support

There are some errors in the formatting or information contained in the signature. – Help Center

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How do I Resolve the At least one signature has problems error in Adobe Reader? – Addo Sign Support

Adobe Reader or Acrobat displays a At least one signature has problems message when signed PDF is opened. Signature validity is UNKNOWN. Signer's identity is unknown.

Adobe Acrobat Reader: Edit PDF on the App Store