# Block a Worker
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If Workers aren't performing to your standards, you can block them from working on your Human Intelligence Tasks (HIT).

**Note**  
Blocking a Worker prevents the Worker from accepting more of your HITs. However, it does not prevent the Worker from submitting assignments that they accepted before you blocked them.

**To block a Worker**

1. On the Mechanical Turk Requester website at [https://requester.mturk.com/](https://requester.mturk.com/), choose the **Manage** tab and then choose **Workers**.

1. On the **Manage Workers** page, choose the Worker ID of the Worker that you want to block.

1. On the **Manage Individual Worker** page, choose **Block Worker**.

1. In the **Block Worker** dialog box, enter a reason for blocking the Worker and then choose **Block**. 

The Worker receives a message with the reason you are blocking them.