Receipt refers to the receipt signed by the customer after the insurance contract is handed over to the customer. The risk warning on the insurance policy and the signature of the insured must be signed by the customer himself. It is illegal to sign on behalf of customers. In the serious criminal law, a contract without the customer's signature is invalid and has no legal effect.
Further reading: How to buy insurance, which is good, and teach you how to avoid these "pits" of insurance.