# Signature verification guides

> Plain-English guides to verifying signatures, spotting forgeries and handling signature data, from the team behind Unforged Nib.

Source: https://unforged.ai/nib/guides

- [How to verify a signature: a practical guide](https://unforged.ai/nib/guides/how-to-verify-a-signature): How to verify a signature step by step: what to compare it with, what to look at by eye, why the person's own references matter, and when to escalate.
- [What is signature verification software?](https://unforged.ai/nib/guides/what-is-signature-verification-software): What signature verification software is, how comparing a signature with the person's own references works, and what a verdict with reasons looks like.
- [Signature verification API: what to look for](https://unforged.ai/nib/guides/signature-verification-api): Choosing a signature verification API: integration, verdict design, data handling and pricing models, with a checklist to use on any provider.
- [Detecting forged signatures: tracing, photocopies and pasted images](https://unforged.ai/nib/guides/detecting-forged-signatures): How forged signatures are made and how to spot them: tracing, photocopies and scans of a real signature, pasted images, and someone else signing.
- [Proof of delivery signatures: checking them at scale](https://unforged.ai/nib/guides/proof-of-delivery-signatures): Checking proof of delivery signatures at scale: what to capture at the door, comparing with the recipient's references, and answering disputes.
- [Signatures and UK GDPR: handling signature data](https://unforged.ai/nib/guides/signatures-and-uk-gdpr): Signature data under UK GDPR: personal and biometric data, lawful basis, impact assessments, processors and retention. General guidance, not legal advice.