If a signature hasn’t been validated yet, click “Validate All” to start the process. Validation may take a while for larger documents that contain multiple signatures. If the signature is invalid, the reader will also tell you the likely reasons for this. Great! How Can I Sign a Docu...
I ran an Accessibility check and there is no outsatnding error in regards of the field objects. At the end of the PDF you have two, not one, digital signature fields: "Signature5" and "Signature6". Borh digital signature field objects behave normal when employing a s...
28 PdfSignature signature = signatureField.getSignature(); 29 // Verify the signature 30 boolean valid = signature.verifySignature(); 31 if(valid) 32 { 33 System.out.print("The signature is valid!"); 34 } 35 else 36 { 37 System.out.print("The signature is invalid!"); 38 }...
可以看到第一个Alice的签名是Certification (author) signature(这个我们会在后期继续细化整理时提到),在一个PDF文档中,最多只允许有一个,它是附带权限的,而后续三个是Ordinary (approval) signature 一个PDF文档中可以有多个。Certification (author) signature的权限根据设置,有三种限制:。1.CERTIFIED_NO_CHANGES_ALLO...
I Just received one very important document from my client to sign it and I installed Adode Reader latest version and open that document which has privilage to sign and I connected the Digital Signture pen drive and clicked on signature button. BUT NOTHING WORKED, WHEN I M CLICKING...
In case the signature status is invalid, you must contact the signer to resolve the issue. For more information about signature warnings, and valid and invalid signatures, see Digital Signature Guide. See how to validate a digital signature Validate all digital signatures Open the PDF for which ...
Invalid Signature Status There were problems validating the signature. The problems can include any changes to the document after the signature was applied. Suggested Articles "The signature contains a timestamp (...) that is not trusted" displays on signature validation status dialog ...
If your digital signature is not verified, it could be due to various reasons: Certificate Revocation: The certificate used to create the digital signature may have been revoked, rendering it invalid for verification. Certificate Expiry: If the digital signature certificate has expired, it cannot be...
import com.spire.pdf.interactive.digitalsignatures.PdfSignature; import com.spire.pdf.interactive.digitalsignatures.PdfSignatureAppearance; import com.spire.pdf.interactive.digitalsignatures.SignImageLayout; public class digitalSig { public static void main(String[] args) throws java.lang.Exception { ...
Information and methods used to include this long-term validation (LTV) information in the PDF comply with Part 4 of the ETSI 102 778 PDF Advanced Electronic Signatures (PAdES) standard. The command is unavailable if the signature is invalid, or is signed with a self-signed certificate. The ...