# AA30 paymaster not deployed

`AA30 paymaster not deployed` is an ERC-4337 EntryPoint error that means no paymaster contract is deployed at the address given in the user operation's paymaster field on this network.

:::info
The first 20 bytes of the `paymasterAndData` field specify the address of the paymaster contract you are requesting to use.
:::

The paymaster contract is not deployed.

## Possible solutions

* Verify that the `paymasterAndData` field is correct, and that the first 20 bytes are the address of the paymaster contract you intend to use.
* Verify that the paymaster contract is deployed on the network you are using.