A more thorough explanation:

An endorsement is when someone writes their name on the back of a document to show that they approve of it or to transfer ownership to someone else. This can be done on things like checks, contracts, or receipts to show that the person who wrote their name on it has received it and believes it to be valid.

One example of an endorsement is when someone writes their name on the back of a check to transfer ownership to someone else. For instance, if John receives a check from his employer but wants to give the money to his friend, he can endorse the check by signing his name on the back and writing "Pay to the order of [friend's name]." This gives his friend the right to deposit or cash the check.

Another example is when someone signs a contract to show that they agree to the terms. For example, if Sarah is buying a car from a dealership, she will need to sign a contract that outlines the price, payment terms, and other details. Her signature on the contract is an endorsement that shows she agrees to the terms and is willing to pay for the car.

These examples illustrate how endorsements are used to show approval or transfer ownership of a document. By signing their name, the endorser is indicating that they have received the document and believe it to be valid.