Whilst checking our passports for our upcoming trip DH noticed he still had his I94W form in his passport! It is currently winging it's way to Kentucky with copies of supporting documents to show he left the US at the correct time following a course he attended in Wichita. Has anyone else had to do this? Do they contact you to let you know that everything is ok? Is it worth taking the same documents with us when we fly next month?

What could be the worse case scenario?