---
title: "Troubleshooting"
canonical_url: "https://www.nutrient.io/guides/ios/signatures/digital-signatures/troubleshooting/"
md_url: "https://www.nutrient.io/guides/ios/signatures/digital-signatures/troubleshooting.md"
last_updated: "2026-05-23T00:08:18.127Z"
description: "Solutions for common issues and errors in Nutrient iOS SDK with debugging tips and workarounds."
---

Troubleshoot common issues you might encounter when setting up signatures.

- [I Have a Chain of Certificates That I Used for Signing but When I Validate the Digital Signature in PSPDFKit It Shows as “Not Trusted”](https://www.nutrient.io/../../troubleshooting/chain-of-certs-not-valid/)
---

## Related pages

- [Biometric Signatures on iOS](/guides/ios/signatures/digital-signatures/biometric.md)
- [Contained Digital Signatures on iOS](/guides/ios/signatures/digital-signatures/contained-signatures.md)
- [Adding a Digital Signature to a PDF on iOS](/guides/ios/features/digital-signatures.md)
- [Signatures in iOS Viewer](/guides/ios/signatures/digital-signatures/built-in-ui.md)
- [Sign PDFs and Add Custom Encryption on iOS](/guides/ios/signatures/digital-signatures/custom-signers.md)
- [Generate a Self-Signed Certificate for Signing on iOS](/guides/ios/signatures/digital-signatures/generate-certificate.md)
- [Customizing Digital Signatures on iOS](/guides/ios/signatures/digital-signatures/customization.md)
- [Secure digital signatures for iOS PDF libraries](/guides/ios/signatures/digital-signatures/supported-methods.md)
- [Validating a Digital Signature on iOS](/guides/ios/signatures/digital-signatures/validation.md)
- [Digital Signature Standards: CAdES and PAdES](/guides/ios/signatures/digital-signatures/standards.md)