iSpyCams

Last photo shoot I got model releases from everyone, however, I have the following questions:

1) What ties the shoot to the release? Do I need a new release for each shoot? Or just per model?

2) I am using a generic adult model release I found online, it is not a legal or binding document in any way in the country I am shooting, it is in English and the girls can't even read it. They know it gives me permission to use their photos and they sign so I imagine it covers my ass internationally and shows good faith, I also have pics of the girls signing the release. Is that good enough? Do I need to do more?

As far as where the girls are locally I am not worried. I don't go there and the girls don't know who I am. The document licenses the content to my company not my person and even if I was in the same grocery line with them they would not know who I am unless I chose to tell them.