Actors contracts and location release forms

Before I can begin filming, I  must make sure I have official permission from actors to partake in my trailer. I also have a location release form signed by the film producers that grants and ensures actors access to the locations that we are planning to use for filming. The actors contract also specifies that any actors involved know what they are signing up to do, and that states that they are not getting paid for any of the filming they are to be involved in.