how to secure rights
we have found a programmer (different country) who is writing a php/mysql search engine script for us. He says "do not worry, you will have the copyright" but just because he says it belongs to us does not mean much, how should i go about gaining that copyright?
Obviously, if he wrote the script, he will keep a copy for himself and if another client comes along looking for a similar script, he could say "sure i have one, take this" Then that client obtains copyright....sees my website 6 months later and says "Thats my script, gonna sue ya".
Is there are standard text for back end scripts (i desinged the frontend, graphics, etc myself) that i could send him, requiring his signature and turning all rights over to us?