Perforated paper

Perforated paper is ideal for use as an invoice, statement, ticket, pay advice slip, remittance advice, company memo, brochure, or consignment note etc. For example, if the paper is being used as a delivery docket the detais can be printed on the form, and then when the delivery driver takes the goods to the customer, he can sign the form either side of the perforated section and then tear the form along the perforation line.
source: https://lgbusinesssystems.com.au/products/perforated-paper-and-business-forms