Each purchaser or receiver of milk from a producer by bulk tank pickup shall give the producer a written statement after each receipt of milk. The statement shall give the name of the producer, the date the milk was received, and the quantity of milk. The statement shall be signed by the purchaser or his authorized representative. A statement of each receipt of milk shall also be given by a purchaser or receiver of milk to a producer whose milk is received in cans, if the producer request such in writing.