# AA32 expired or not due

`AA32 paymaster expired or not due` is an ERC-4337 EntryPoint error that means the paymaster's signature on the user operation is outside the `validAfter` and `validUntil` time range it set.

:::info
By default, signatures from Pimlico's verifying paymaster are only valid for 10 minutes.
:::

The paymaster's signature used in the `paymasterAndData` field of the user operation is not valid, because it is outside of the time range it specified.

The paymaster's `validatePaymasterUserOp` function returns `validationData`, a `bytes32` field. This field is a concatenation of the `validAfter`, `validUntil`, and `aggregator` fields.

This error occurs when the `block.timestamp` falls after the `validUntil` timestamp, or before the `validAfter` timestamp.

## Possible solutions

* If you are using Pimlico's paymaster, send the user operation within 10 minutes or [extend the validity period](/guides/how-to/paymasters/extending-sponsorship-duration) up to 24 hours.
* If you are using your own paymaster contract and using time-based signatures, verify that the `validAfter` and `validUntil` fields are set correctly and that the user operation is sent within the specified range.
* If you are using your own paymaster contract and *not* looking to use time-based signatures, verify that the `validAfter` and `validUntil` fields are set to `0`.