[AccessD] "fuzzy logic" search

My client is having difficulties where the data input people are entering
duplicate claims because wrong names or SSNs are entered.  He's asked how
difficult it would be to do a search for the names entered (seems irrelevant
if it is wrong) but then has asked how difficult it would be to do a "fuzzy
logic" search for SSNs that are different by up to 2 characters.  I don't
even have a clue how to attack something like that.  Any ideas (other than
"out the door, no parachute")?

John W. Colby
www.colbyconsulting.com