---
title: "Fix digital signature issues on Android"
canonical_url: "https://www.nutrient.io/guides/android/signatures/digital-signatures/troubleshooting/"
md_url: "https://www.nutrient.io/guides/android/signatures/digital-signatures/troubleshooting.md"
last_updated: "2026-09-02T09:24:06.183Z"
description: "Learn how to troubleshoot and resolve common digital signature issues on Android, including validation problems with certificate chains and multiple signatures."
---

# Troubleshoot digital signatures on Android devices

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 Nutrient it shows as “not trusted”](https://www.nutrient.io/guides/android/signatures/troubleshooting/chain-of-certs-not-valid.md)

- [I am signing a document with multiple digital signatures and previous signatures show as “not valid”](https://www.nutrient.io/guides/android/signatures/troubleshooting/multi-signatures-previous-not-valid.md)
---

## Related pages

- [Understanding digital signatures in Android apps](/guides/android/signatures/digital-signatures/overview.md)
- [Understanding PAdES and CAdES digital signatures](/guides/android/signatures/digital-signatures/standards.md)
- [Robust digital signature support on Android](/guides/android/signatures/digital-signatures/supported-methods.md)