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Duplicate Elimination

Advanced contact data matching algorithms identify duplicates on your file.

Questions?

1-800-454-0223

The following trademarks are owned by the United States Postal Service®: CASS, CASS Certified, DMM, DPV, DSF2, eLOT, First-Class Mail, LACSLink, NCOALink, PAVE, Post Office, Postal Service, Standard Mail, U.S. Postal Service, United States Post Office, United States Postal Service, USPS, ZIP, ZIP Code, and ZIP + 4.

DSF2 processing is provided by a nonexclusive licensee of the United States Postal Service. Melissa Data is a nonexclusive Interface Distributor and NCOALink Full Service Provider, DPV and LACSLink Licensee of the United States Postal Service. The prices for NCOALink and DPV services are not established, controlled, or approved by the United States Postal Service.

Duplicate Elimination reduces wasteful and counter productive direct marketing efforts from unwanted, repeat communications to the same household or individual. The Duplicate Elimination service uses advanced name and address matching algorithms to identify duplicates of the same individual, or different individuals at the same household. In this way, mailers can avoid aggravating customers with unwanted, repeat mailings and ensure that intended recipients are not overlooked.

After running this service, you will receive a result file with the duplicate records identified with a set ID. All records in the duplicate set, except the survivor record, are marked with a duplicate flag.

A summary report provides you with statistical data describing your results and a record layout defines field positioning and content.

Benefits

Increase marketing campaign ROI by not duplicating contacts.
Save costs associated with printing and mailing duplicate contacts.
Increased accuracy of data analysis.
Reduce environmental and financial costs associated with duplicated mail.
Avoid aggravating customers with unwanted repeat mailings.

Match Rates

2 - 20% Range.

Match Rate Factors

List quality (structure, format, data entry)
List type (profile, function, demographics)

Related Services

Improve overall address accuracy by also running CASS^TM Address Standardization and the National Change of Address (NCOA^LinkTM) service.

Add and verify telephone numbers by running Telephone Number Verification & Append.

File Format Specification

Please see the File Format Specification for information on required input and standard result fields.

This service also appends the following fields:

Field Name	Length	Description
Duplicate Flag	1	"X" = Duplicate "-" = No Match/Non-Duplicate
Duplicate Set ID	10	This column contains the duplicate set ID. A duplicate set consists of two or more records. All records in a duplicate set have the same ID number.