I have a database the keeps tracks of printers by serial number. There is a form for doing this, the form has a serial number field, and a status field "example move, add, remove" , effective date and a location field. Here is what I want to do, lets say that the current location for serial#ABC is in location C and then the user opens the form and tries to move serial #ABC to locaiton C, how can i display a message saying that Serial#ABC is already at location C, maybe I can do this by a DLookup or by a record set, but the only thing that i'm struggling with is how do I make it look at the latest record by the effective date. Thanks.