I already have permission from the club owner to photograph the event for posting editorial images n stick photo agencies. What kind of things do I need to include in the paper she signs to show that I have the credentials for the agencies?
i don't quite fully understand what you mean. but if you are with ss,
all they need is a letter from the club saying you have permission or do not need permission to shoot photos at the club, and that these photos can be used for stock editorials. then ss will give you a credential number for you to use
when you submit those editorial photos.