So I found out after titling, getting insurance, and registering my car back to CO that NY wants the plates back I have never heard of this before. Is this a big deal if I don't? Since changing plates, I have lost place of the old ones as they don't have any value to me. I mean I never kept my other plates before, granted they were two separate sets of CO plates (and neither have my parents from the states we have lived in) and have donated some to restaurants that collect them Is it critical I find these? Why is NYS weird like this?