I think it is important that you have copies of custody orders, and if you do not, that you have a very FIRM written agreement on who picks up which day, and in writing if they change that for even one day. It covers you if you release the child to a parent who does not have "physical custody" that day and the other parent gets upset about it. Also, since you cannot withhold a child from a parent, UNLESS there is a custody order on file that says they are not to have the child on specific days, your covering your butt if a parent shows up on a day they aren't supposed too and you don't have permission from the custodial parent for the other to pick up.
Also, it is imperative that you have emergency cards from both parents, with each of their physical addresses, work addresses, emergency contact info, etc. If anything ever happens, you'll need info for both parents in case you cannot reach one of them.
You may want to call your licensor just to verify that you should indeed have custodial information.
