According to the normal purchasing process, the buyer should prepare tickets in triplicate, two copies should be given to the warehouse keeper, and the remaining one should be filed by himself. After checking that the goods are correct, the warehouse keeper will sign for the goods and keep them, and then give one of them to the financial accountant for bookkeeping, so that all three parties have vouchers, and the financial accountant can use the warehouse receipt to check with the invoice when paying, which is convenient for payment and accounting. If the invoice of the other party does not arrive, the financial warehouse receipt will always remind you.