> For the complete documentation index, see [llms.txt](https://simpaypl.gitbook.io/simpay-laravel/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://simpaypl.gitbook.io/simpay-laravel/payments/validate-ipn-signature.md).

# Validate IPN signature

```php
SimPay::payment()->ipnSignatureValid(request());
```

Response will be boolean.

* true means signature is valid and you may proceed with IPN handling
* false means signature is not valid and request may have been tampered. **DO NOT** handle that IPN.