An indicia is an imprint on a mailpiece, that is instead of a stamp, indicating that postage has been paid. All pieces in a permit imprint mailing must be the same weight. The mailer must submit forms and a fee to the Post Office where the pieces will be mailed.
TIP: Many print vendors handle this as part of their mailing and fulfillment services.
For more info, see this USPS Quick Service Guide on permit imprints.
See all of the A to Z of Design posts here.
Mailers take note: new mailing prices go into effect Monday, May 11, 2009. One of the most notable changes is an increase in the cost of first-class stamps (42¢ to 44¢). Forever Stamps will always be valid as First–Class postage on standard envelopes weighing one ounce or less, regardless of any subsequent increases in the First–Class rate.
See the USPS website for detailed info about price changes. Buy Forever Stamps online here!