Barcode (BC) - A series of vertical bars and spaces that represent any numerical series, most often a correct ZIP Code for the delivery address on a mail piece. The barcode facilitates automated processing by barcode readers and scanners. Barcodes that may be used for postal processing are POSTNET, Interleaved 2-of-5, Code 39, Code 128, and UCC/EAN Code 128. (Also see delivery point barcode and Postal Numeric Encoding Technique.)
Coding Accuracy Support System (CASS) - A service offered to mailers, service bureaus, and software vendors that improves the accuracy of matching to delivery point codes, ZIP+4 codes, 5-digit ZIP Codes, and carrier route codes on mail pieces. CASS provides a common platform to measure the quality of address matching software and to diagnose and correct software problems.
First-Class Mail (FCM) - A class of mail that includes all matter wholly or partly in writing or typewriting, all actual and personal correspondence, all bills and statements of account, and all matter sealed or otherwise closed against inspection. First-Class Mail comprises three subclasses: postcards, letters and sealed parcels, and Priority Mail. Any mailable matter may be sent as First-Class Mail. First-Class Mail is a USPS trademark.
Indicia - Imprinted designation on mail that denotes postage payment (e.g., permit imprint).
Letter-size mail - A mail processing category of mail pieces, including cards, that does not exceed any of the dimensions for letter-size mail (that is, 11-1/2 inches long, 6-1/8 inches high, 1/4 inch thick).
Meter stamp - A postage imprint (either on meter tape or as a direct impression) applied in the upper right corner of the envelope, address label, or tag. The type, size, and style of the imprint must be fixed when the postage meter is approved for manufacture by the USPS. For letter-size mail, the imprint must be set in fluorescent ink.
National Change of Address (NCOA) - An address correction service that the USPS provides to mailers through USPS licensees. The licensees match mailing lists submitted to them on tape or disk against change-of-address information for the entire country from all Computerized Forwarding System units. If a match is made, NCOA can correct the address before it is printed on a mail piece.
Presorted First-Class Mailing - A non-automation rate category for a mailing that consists of at least 500 addressed mail pieces and is sorted and prepared according to USPS standards. This mail does not bear a barcode.
Presorted mail - A form of mail preparation, required to bypass certain postal operations, in which the mailer groups pieces in a mailing by ZIP Code or by carrier route or carrier walk sequence (or other USPS-recommended separation).
Presorted Standard - The postage rate for Standard Mail (A) pieces that are part of a mailing and that meet minimum volume and preparation requirements.
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