Postal: Three Ways to Reduce Postal Costs and Increase Response

3. Use supplemental processes to find more ZIP + 4 records. Many ZIP + 4 engines can’t match incomplete addresses, Yapuncich says. For example, if a record is missing a street number, a match won’t be made. If your list services provider offers a process to complete addresses with missing information, consider using it. Yapuncich points out that adding ZIP + 4 codes to your addresses will save about 6 cents per book mailed in addition to increased response.