Before you mail, identify addresses that are undeliverable

Delivery Sequence File* – Second Generation (DSF2®) is an address accuracy tool that identifies addresses that are deliverable and addresses that are not. Your file is matched to over 145 million addresses (delivery points) in the USPS® DSF2® database.

DSF2® processing identifies address characteristics that enable marketers to distinguish between residential and business addresses, seasonal addresses, vacant locations and the mail delivery method – curbside delivery, door slot, NDCBU (Neighborhood Delivery and Collection Box Unit) or central delivery.

DSF2® also assigns walk sequence numbers and provides the documentation necessary to qualify for additional United States Postal Service (USPS®) delivery sequence postage discounts.

A Delivery Point Validation (DPV®) module confirms that an address is correct and is an actual USPS® delivery point. It also identifies if the address is a Commercial Mail Receiving Agency(CMRA).

All DPV® functionality is included in DSF2®. DPV® identifies if an address is missing secondary data (Apt#), or contains incorrect secondary data.

DSF2® Features and Benefits

Provides Carrier Route Number, Carrier Delivery Sequence Number, Delivery Point Barcode (DPBC), Business or Residential indicator, Seasonal Code indicator and Occupied/Vacant Code indicator.

Reports Include: Footnote and Delivery Type Counts. National Deliverability Index. Anchor’s Deliverabillity Index Score and PS Form 3553 for CASS Certification.

This service requires a DSF2® Processing Acknowledgement Form.

  • DSF2® generally enables you to identify 3-6% of your mailing as potentially undeliverable
  • Improves mail deliverability through address standardization and verification at the delivery point level
  • Qualifies mail for additional walk sequence and saturation mail postage discounts
  • Saves on postage and material costs by eliminating undeliverable as addressed mail, i.e. non-existent, incorrect, or incomplete
  • Dedicated customer support