A more thorough explanation:

A receipt is a legal document that proves a buyer has purchased and taken possession of goods. It can be a small paper itemization of goods purchased in a retail setting or a document that proves ownership of an item stored in a warehouse.

For example, when you buy groceries at a store, you receive a receipt that shows what you bought and how much you paid for it. This receipt is proof that you bought those items and can be used to return or exchange them if necessary.

Receipt can also refer to the act of receiving something. For instance, if you receive a notice from the government about your taxes, the fact that the notice was mailed to you is evidence that you received it.