A delivery point barcode (DPBC) is a combination of the Zip Code, the Plus4 and the last 2 digits of the street address. This makes each DPBC unique for each address. The USPS use machines that sort by this DPBC to make delivery more efficient. This is why the USPS is so willing to give a discount for supplying this DBPC.

A letter is defined by the USPS as a mail piece that measures at least 3 ¼” x 5” and no bigger than 6 1/8” x 11 ¼”. There are ratio factors that sometimes make irregular shaped envelopes subject to a surcharge.

Merge/purge is a term used when combining more that one mailing list and eliminating the duplicate names and addresses.

Metering is a term used referring the applying of a postage through a post meter as opposed to applying stamps.

To mail at non-profit postal rates the group or organization first must be approved by the USPS. A government approved non-profit organization is not automatically approved as a non-profit mailer. There is a form that must be submitted along with the supporting documentation to the mailing post office. There is no charge for this application.

Postcards are defined by the USPS as being a single sheet of card stock measuring more 3 ¼” x 5” but not more than 4 ¼” x 6”.

Self-mailer is a term used when a piece paper is printed on one or two sides and then folded in such a way that it can be mailed without a envelope. A self-mailer is held shut with one or two wafer seals depending on paper weight and fold position.

Standard - The United States Postal Service now uses the term Standard Mail instead of the old term Bulk Mail. The contents of a Standard Mailing must be generic in nature. Invoices, statements, personal letters, etc. cannot be sent Standard Mail.

However, a mail merge program can used to generate personalized salutation. Standard Mail does not travel as quickly as First Class and the USPS does not offer any type of service guarantee. Undeliverable as addressed mail is not returned. With this in mind, it is usually advisable to include the words “Or Current Resident” as part of the address so that the mail pieces will be delivered to whoever is currently living at that address.

Wafer sealing is also known as tabbing. These are little round adhesive circles that are used to hold self-mailers closed. These are now required by the USPS instead of staples. The quantity and position of the seals are determined by paper weight and fold position

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