A document indicating what the customer received is known as a:

A document indicating what the customer received is best represented by a sign-off sheet. This type of document is typically used to confirm that the customer has received the products or services as agreed upon. It serves as an acknowledgment from the customer that the delivery was made, detailing what was received and often requiring the customer's signature to validate that the items meet the expected standards or requirements.

While other options also relate to elements of service or delivery, they do not specifically represent the acknowledgment process for received items as effectively as the sign-off sheet. A service report typically focuses on the details of the service performed rather than what was received. A delivery note might track items shipped but is not commonly used for a customer's acknowledgment. Contract verification usually pertains to confirming the terms of the agreement rather than the receipt of goods or services.