9-2 Conditions for Servicing

9-2.1 General Information

Materials submitted for pictorial postmarks at temporary philatelic stations or philatelic outlets, or submitted through the mailstream for mail–back service, must bear an uncanceled postage stamp at the applicable First–Class Mail rate.

Photographs, postcards, other materials having a glossy–coated or hard–calendered surface, or other materials that do not readily accept ink are submitted for postmark at the customer’s risk. The Postal Service is not responsible for smudged postmarks or offsetting on such types of material.