A check is a document that orders a bank to pay a specific amount of money from a person's account to the person in whose name the cheque has been issued. Checks are still broadly used in the United States as a valid form of sending and receiving money.

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Yes, either natively with banks or with a third party providerNo, although a stop payment may be issued directly with the bank up until the check is deposited.Yes, using a bank Lockbox serviceDepends on the bank