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Support / FAQs / Services / Data Cleansing

How long will my data cleanse take?

The time taken to run an address data cleanse obviously depends on the number of records in the file being cleansed, but it also depends on the quality of the data input. You can, however, expect your file to be cleansed at a rate of up to 100 cleanses per second, or 360,000 records an hour.

What do the rankings returned by the cleansing indicate and what ranking should I cleanse to?

The address cleansing works by trying to match the components of the address submitted against the Royal Mail Postcode Address File (PAF®) database. As you will appreciate, an address which has all of the address lines present is likely to be matched, whereas an address containing just address line one and a postcode will be much more difficult to match. For this reason, we rank the results with a confidence ranking. If an address is of very poor quality, then the match we make against PAF® could, in some cases, be incorrect. “Rank A” means a very high-quality match and you can be confident the result is correct. A “RANK U” match indicates the address is so bad that we cannot find a match. We usually suggest cleansing an address against Ranks A-C or Ranks A-D, though this is down to personal preference, which is why we give you the choice.