> ## Documentation Index
> Fetch the complete documentation index at: https://base-a060aa97-feat-add-b20-demo.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# IB20.burnBlocked

> Generated B20 reference for burnBlocked(address,uint256).

## Signature

```solidity theme={null}
function burnBlocked(address from, uint256 amount) external;
```

| Field               | Value                          |
| ------------------- | ------------------------------ |
| Selector            | `0xec0cf3dc`                   |
| Canonical signature | `burnBlocked(address,uint256)` |

## Description

DEPRECATED. Burns `amount` from a `from` account that is blocked under
`TRANSFER_SENDER_POLICY`, without spending an allowance. Retained for back-compat;
prefer `seizeWithMemo` (to a treasury/self address) followed by `burn`.
Emits `Transfer(from, address(0), amount)` and `BurnedBlocked(caller, from, amount)`.
Dev: Gated by `BURN_BLOCKED_ROLE` and the `BURN` pause vector (not `SEIZE`). Its blocked check
reads `TRANSFER_SENDER_POLICY`, distinct from `seizeWithMemo`'s `SEIZE_HOLDER_POLICY`.
Dev: Reverts with `ContractPaused(BURN)` when `BURN` is paused.
Dev: Reverts with `AccessControlUnauthorizedAccount` when the caller does not hold `BURN_BLOCKED_ROLE`.
Dev: Reverts with `AccountNotBlocked` when `from` is currently authorized under `TRANSFER_SENDER_POLICY`.
Dev: Reverts with `InsufficientBalance` when `from`'s balance is below `amount`.
Param: from   Account whose blocked balance is being burned.
Param: amount Amount to burn.

## Access control

`BURN_BLOCKED_ROLE` gates deprecated blocked-burn calls.

## Policy interaction

Checks `TRANSFER_SENDER_POLICY`; the account can be burned only when not authorized by that policy.

## Example

```solidity theme={null}
IB20(token).burnBlocked(from, amount);
```

## Related

* [IB20 reference](/base-chain/specs/upgrades/beryl/b20/specification/reference/interfaces/IB20)
* [Constants & addresses](/base-chain/specs/upgrades/beryl/b20/specification/reference/constants-and-addresses)