I have a table within my database where I enter social security numbers for the purpose of keeping drug testing records. Within that database I have a table where I keep a list of drug testing failures. (tblTest) and (tblFailures). I have linked them with Social Security Number. I am trying to make a message box pop up if I enter a social security number in the tblTest that appears in the tblFailures telling me that they are not eligible for hire. I have tried conditional macros, and also tried validation text. I can't get it to work. Any suggestions?