- The NCOA file is a consolidated file
of move information that on average contains approximately
108 million permanent change-of-address (COA) records
filed with the U.S. Postal Service. Each record contains
the relocating Postal customers name along with an Old
and New address. The Old address is the one compared to
the NCOA customers list for matching purposes and the
New address is the one returned, if a match is made, to
the customer. These records are retained on the file for
a three year period from the move-effective date.
- * The source of the NCOA data is a
permanent Change of Address (COA) filed by the relocating
postal customer. Approximately 40 million of these COA’s
are filed annually. The NCOA database is updated every
two weeks with this information.
- The new address supplied by the postal
customer must be ZIP+4 codeable to qualify for addition
to the NCOA file.
- The typical profile of the new address
information contained in the 108 million records on the
NCOA file is as follows:
- 84.30% are forwardable moves
(contain address information)
- 12.85% are moved-left-no-address
- 2.65% are PO BOX closed
- 0.20% are foreign moves
- * All input addresses submitted by
an NCOA customer are standardized and Coding Accuracy
Support System (CASS) certified ZIP+4/DPC processed. New
address information is provided only when an NCOA match
to the input name and address is attained.
- * The provision of Change Of Address
information is controlled by strict name and address matching
logic. To make the best use of the information returned
to them from the NCOA process, potential customers should
understand NCOA matching logic. All matches made to the
NCOA file require complete address matching logic. Name
matching logic is determined by the move type in the data
record on the NCOA file that is a candidate for a match.
Move Types and associated
Name Logic are:
Match on first name, middle name or initial, surname and
title required. (The NCOA customer can elect to have only
individual match logic utilized regardless of the move
type in the NCOA record when the file is processed.)
Match to surname only
The NCOA file is comprised
of approximately 47% family moves and 47% individual moves.
- When possible, postal customers who move multiple times
within the three year period are linked or chained to
ensure that the latest address is furnished when an NCOA
match is attained. This is not always possible if subsequent
COA’s are not filed in exactly the same manner as
a COA filed previously (e.g., if move types differ - family
vs individual then they will not be chained).
- NCOA Nixie matching is an optional process that can
be requested by the customer from most NCOA licensees.
The Nixie matching process provides footnotes indicating
why an authorized NCOA match could NOT be made to the
input address (e.g., Nixie code ‘U’ - Apartment
- A National Deliverability index (NDI) report is supplied
for each list that is NCOA processed providing a uniform
methodology to evaluate deliverability of the address
Every customer taking
advantage of NCOA processing must have completed and returned
to their NCOA licensee the “NCOA PROCESSING ACKNOWLEDGMENT