Excuse me, the payer typed the receipt, and the payee only signed his own name. Is this receipt valid?
Valid, as long as the payee signs it himself. Many people only write their own names, not receipts. As long as you write it and read it to him later, he can sign it if he has no problem. I am engaged in management work, and I often encounter such things, which can also be used as the basis for financial reimbursement.