A comprehensive guide to understanding, diagnosing, and solving every PDF signature problem. From certificate errors to compatibility issues, we cover it all.
PDF signature errors are a widespread issue affecting users across different platforms and applications.
Our client-side approach eliminates the root causes of PDF signature problems entirely.
What it means: The PDF viewer doesn't recognize or trust the certificate used to sign the document.
What it means: The certificate used to create the signature has passed its expiration date.
This is the most common and frustrating error users encounter, especially in Adobe Acrobat.
This error occurs because PDF signature validation is extremely complex and sensitive. Even automatic processes like email compression, cloud storage optimization, or viewer updates can trigger this error.
The signature doesn't pass cryptographic validation checks.
One of the biggest challenges with PDF signatures is that a signature working in one viewer might fail in another. Each PDF application handles signature validation differently.
PDF signatures are extremely sensitive to document changes. Even modifications invisible to users can invalidate signatures.
You need to share the document for others to verify the signature, but sharing the document (via email, cloud storage, etc.) often modifies it enough to invalidate the signature. This creates an impossible situation.
SignItPDF eliminates 100% of certificate-related errors by not using certificates at all. Instead, we embed signatures directly into the PDF using a method that's universally compatible and immune to the common issues that plague traditional PDF signing.
| Error Type | Traditional PDF Signing | SignItPDF |
|---|---|---|
| Certificate not trusted | ❌ Common | ✅ Impossible |
| Certificate expired | ❌ Frequent | ✅ Never happens |
| Signature has problems | ❌ Very common | ✅ Never occurs |
| Cross-platform issues | ❌ Regular problem | ✅ Universally compatible |
| Document modification errors | ❌ Extremely sensitive | ✅ Highly resistant |
| Setup complexity | ❌ High | ✅ Zero setup |
Why waste hours troubleshooting certificate issues, compatibility problems, and validation errors? SignItPDF eliminates every single one of these problems with a revolutionary approach that just works.
No signup required • Complete privacy • Works on all devices • Guaranteed to work every time