What must be present for an Ancillary Service Endorsement to be valid?

An Ancillary Service Endorsement is a crucial part of mailing procedures as it provides additional instructions regarding how to handle a piece of mail that may require special attention after it has been sent. For this endorsement to be deemed valid, it is essential that there is clear space on all sides of the endorsement. This requirement ensures that the text is easily visible and not obstructed by any other markings or design elements on the envelope.

By maintaining clear space around the endorsement, postal workers can quickly identify and understand the special handling instructions, preventing confusion and ensuring that the mail is processed accurately and efficiently. This adherence to guidelines helps maintain standardized practices within mail delivery services, ensuring consistency across various mail types.