We are an Airline Org. When a passenger comes on web to create a case, he has to provide certain details which are not mandatory on the web.
So if a passenger A comes to web and decides to provide his wrong Document number say 11111111 with his first name and last name,we create a client in Salesforce with that name and document number(if he doesn't already exist as client) and links the case with him.
Now a passenger B comes for claims on web and decides to give his document number again as any random number say as 11111111. Now in this case what happens is we create a case and attach it to Passenger A.
Since we think the document number 11111111 is for Passenger A. How can we apply a stringent check?
Since First name and last name can be same for people we cannot apply that check.