The delivery address specifies the location to which the USPS is to deliver a mailpiece. USPS Marketing Mail Eligibility Decision TreeĤ.0 Detached Address Labels (DALs) and Detached Marketing Labels (DMLs)Ĩ.0 Presort Accuracy Validation and Evaluation (PAVE)ĩ.0 Coding Accuracy Support System (CASS)ġ0.0 Dual Shipping Labels 1.0 Elements of Addressing 1.1 Clear SpaceĪ clear space must be available on all mail for the address, postage (permit imprint, postage stamp, or meter stamp), postmarks, and postal endorsements.Designing Letter and Reply Mail (PUB 25).