When accessing the W2 services, some allow you to specify a Name and DOB threshold to restrict or limit the matches found to those you find most appropriate. Below is an explanation of how the thresholds works, with examples.


Name Scoring Threshold

W2 use a numerical scoring system for name matching. We always look for each term within the search criteria, seeking them in the profile name, or known aliases. We then determine a score based on how much of the name is matched: 

  • A score of 80 means that Alert Profile name contains Client record name in any order.
  • A score of 85 means that Alert Profile name contains Client record name in the same order.
  • A score of 90 means that Alert Profile name contains Client record name in the same order with no gaps.
  • A score of 100 means that Alert Profile name matches exactly the Client record name.


Examples

When using the search 'David Evans', the following results would generate associated scores:

  1. Evans James Davidson        Score: 80 (Due to matching 'David' and 'Evans' within the alert profile in any order.)
  2. David Robert Evans             Score: 85 (Due to matching 'David' and 'Evans' in the same order as the request.)
  3. David Evans                        Score: 100 (Due to matching 'David Evans' exactly.)


DOB Scoring Threshold

For Date of Birth matching a numbered scoring system 0-100 (100 being a total match) with a weighting towards Year of Birth and positive/negative depending on factors that match/mismatch is used:

  • Year of Birth match is +60, Year of Birth mismatch is -60
  • Month of Birth match is +20, Month of Birth mismatch is -20
  • Day of Birth match is +20, Day of Birth mismatch is -20
  • Missing information in any of the above fields is +/-0


Examples

DOB SuppliedDOB Matched
Score
DayMonthYearTotal
18/02/198818/02/1988+20+20+20+100
18/02/198801/02/1988-20+20+60+60
18/02/198818/--/1988+200+60+80
18/02/1988--/--/198800+60+60
18/02/198818/02/1966+20+20-60-20



When calling records using a score on either Name and/or Date of Birth only records matching that score or greater will be returned. In some cases the Date of Birth held within Sanctions records is not in a recognisable format, such as ‘circa 1960’ or ‘between 1965 and 1970’. In these, and other similar cases we treat the Date of Birth as missing for scoring purposes.