A visible signature on a PDF is not, by itself, proof of a valid electronic signature. Verification requires checking the document's digital signature and certificate.

How do I open the signature details?

Open the PDF in Adobe Acrobat Reader. Select the relevant signature in the Signatures panel and review its validation status and Signature Properties. Menu names may vary by application version and language.

What should I check?

• The signer's certificate details.
• Whether the document was changed after signing.
• Certificate chain trust and the validation result.
• Whether certificate revocation status could be checked.
• The timestamp validation result, if a timestamp is present.

Is a displayed name or email address enough?

No. A name, email address or logo in the signature appearance does not determine validity. Adding an image of a handwritten signature is also different from creating a certificate-based digital signature.

What does an unknown validity warning mean?

This warning does not, by itself, prove that a document is fraudulent. Certificate trust, connectivity or verification settings may prevent validation. Do not mark unfamiliar certificates as trusted simply to remove a warning.

See Adobe's official verification guidance. For help with your E-İmzaTR certificate, contact Online Support in Turkish.