Certify signature invalid after conversion

[Israr Iftikhar]

Hello,

We are converting a transparent image PNG to PDF using some document conversion library. PDF document generated successfully. We are applying certify signature (via all three possible permissions according to ISO 32000-1:2018) on the converted PDF document. Once certify signature is applied, Adobe Reader or Acrobat Pro shows signature INVALID.

Would you share what’s wrong with it resulting certify signature INVALID? I can share both unsigned and signed PDF documents via email. Please share your email address.

Your quick feedback on this is appreciable.

Kind Regards,

Israr Ahmed

[Test Screen Name]

Reader should tell you.

[margueritek]

The Certifying signature needs to be Trusted.