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Address List Validation FAQs

Frequently asked questions from our customers


  • How do you verify my list of addresses?

EDQ leverages the most recent data from the U.S. Postal Service® (USPS) to verify your list of addresses.  Simply upload your file and EDQ's service will quickly verify the address data, correcting minor errors and identifying which addresses are good for mailings and which need more attention.

  • How should I label the columns in my input file?

You will need to have at least one column with the title 'Address', but all columns containing address information should have this label as well. You are free to label any other column on the spread as you would like.

  • How should I mail to my results?

Experian Data Quality organizes your results into three buckets so you can quickly segment your data and mail to only deliverable addresses.  Addresses in the "Verified" and "Corrected" categories are confirmed to be deliverable addresses  and can be mailed to.  Addresses in the "Unmatched" category are missing important information such as apartment or suite information, or contain multiple errors that cannot be automatically corrected by an automated service.  These addresses should not be mailed to as they will likely result in returned mail.

  • How much does this cost?
Volume Price
0 - 10,000 $0.04 per record (min $50)
10,000 - 50,000 $0.03 per record
50,000 - 100,000 $0.02 per record
100,000 - 250,000 $0.01 per record
250,000 - 500,000 $0.0075 per record
  • What are the different verification levels that you output and what do they mean?
    • Verified: This match type occurs when the input address is matched exactly to the USPS data. To return a "Verified" match, all address elements must be verified as correct, with the possible exception of minor formatting changes. The address can therefore be accepted as it is.
    • Good Full: This match type occurs when the input address is matched to the USPS data. Some formatting changes are permitted; for example, spelling changes to a single element, a change or correction to the ZIP code or the addition of a +4 code. Following such changes, the address is fully verified and can be accepted.
    • Tentative Full: This match type occurs when the input address is matched to the USPS data but there is a lack of confidence that either the result is correct or the address is complete. This typically occurs when an address contains both a street and a PO Box, multiple element changes or when there is a lack of secondary information. In such cases, the output address should be viewed before it is accepted.
    • Multiple: This match type occurs when multiple addresses in the USPS data match the input address. This occurs when information is missing from the input address; for example, the street descriptor, street directional or ZIP code. The output address should be reviewed before it is accepted.
    • Unmatched: This match type occurs when the input address could not be matched to any addresses in the USPS data. Original input will therefore be returned.
    • Foreign: The input address has been marked as foreign, either due to the country field that has been supplied or to place level address elements (for example a ZIP code) which indicate that the address is not a US one. No output address can therefore be returned.

  • What if I know an address exists but the service will not verify the address?

EDQ uses USPS data in order to verify address information.  It is possible that the address you are looking for is not contained within the USPS database. Possible reasons are that the address belongs to a brand-new development or mail does not get delivered to that particular address.  You can check to see if an address is in the USPS data by using the USPS Zip Code Look Up feature on their website

  • What is "DPV" and what do the different DPV confirmation response codes mean?

"DPV" stands for "Delivery Point Validation". This is a USPS validation process that confirms an address exists and can be delivered to. The DPV Confirmation Indicator confirms whether the selected address is DPV confirmed. There are four possible return values:
Y: Address is DPV validated
N: Address is Not DPV validated
S: Match to Primary; Secondary not validated
D: Match to high rise default
[Blank]: Not present in DPV data

  • What do the DPV footnotes mean?

The footnotes contain extra information returned by the DPV lookup. Between 1 and 3 of the following 2-character codes will be returned:
AA: Input address matched to the ZIP+4 file
A1: Input address not matched to the ZIP+4 file
BB: Input address matched to DPV (all components)
CC: Input address primary number matched to DPV but secondary number not matched(present but invalid)
F1: Input address matched to a military address
G1: Input address matched to a General Delivery address
N1: Input address primary number matched to DPV but high-rise address missing secondary number
M1: Input address primary number missing
M3: Input address primary number invalid
P1: Input address missing PO, RR, or HC Box number
P3: Input address PO, RR, or HC Box number invalid
RR: Input address matched to CMRA and PMB designator present
R1: Input address matched to CMRA but PMB designator not present
U1: Input address matched to a unique ZIP Code

  • I know that the city name/street name is correct yet it has been replaced after verification, how can this be?

Certain cities and streets have several names that are recognized by USPS but there is always a primary name that they will use for each city/street, this is the "Preferred" name.  If the city or street has been replaced it is because it is an alternate of the preferred name.  As an example, the preferred city name for 02129 is Charlestown, however Boston is an alternate city name sometimes used for this ZIP code.  Boston would be replaced with Charlestown.

  • Do you offer a CASS™ report through this service?

A CASS™ report is not available through this service.  If you require a CASS™ report please contact us to discuss the options we have available.

  • Do you offer National Change of Address (NCOA) processing through this service?

NCOA processing is not available through this service.  If you require NCOA processing please contact us to discuss the options we have available.


General Questions: Check out our General FAQs page

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