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Mailing File

When you purchase any of our data cleansing services, you will receive an output file of the same format as the file you provided. Any services that provide additional data will create extra columns at the end of your file, e.g. adding goneaway flags or a cleansed version of the address.

If you are doing a mailing based on your data, you may also choose to select the Mailing File service. This produces an additional file in a fixed format to make it easy to produce your mailing. Regardless of the type of file or number of columns you provide to us, and whether you purchase services such as Goneaway and Deceased as flags rather than suppressions, the Mailing File output will always:

  • be a CSV format file
  • contain a header line
  • remove any records that are matched by services such as MPS, Goneaway, Deceased or Deduplicate, even if you purchased these services with the flagging option

File Layout

The column layout of the mailing file is always:

  1. ID
  2. Title
  3. First Name
  4. Last Name
  5. Address Line 1
  6. Address Line 2
  7. Address Line 3
  8. Address Line 4
  9. Town
  10. Postcode
  11. DPS
  12. Country


If you included an Identifier column in your file, this value will be used for column 1. Otherwise this will be the number of the record within your source file.


If you purchased the results of the Name Cleansing service, the cleansed name is used for columns 2 - 4. Otherwise, the name (if any) supplied in your source file will be used. The columns for any parts of the name that you did not include any data for will be left blank, e.g. if your source file had columns for first name and last name but not title. If your source file had a single column for the name rather than the different parts being split out, you must purchase the Name Cleansing service in order to purchase the Mailing File.


The address in the Mailing File will take into account any new addresses you may have purchased through the Movers service. The address will always be formatted to fit over 4 lines plus the town and postcode in separate fields. Note that the county is not included as the use of the county for mailings is discouraged by Royal Mail. The DPS is also included in a separate field to help you apply mailsort or similar bulk mailing programmes.


The country field will be taken from the results of the Country Detection service if you have purchased it. Otherwise it will use the value in the column in your source file that was mapped as the country field. If the source file didn't contain a country column, this field will be left blank.