Things I would consider are CUSTODY ORDERS and making sure it is CLEAR that without a legal court orders document on file that states otherwise to show the police you cannot deny one parent or another access to their child via pick up from your program ... this is the most common challenge is that things go sour and one parent decides the other should not have access ~ you cannot legally enforce that without a court order and if you TRY you could be charged with 'unlawful confinement' by the parent who you've been told cannot have access.
The other thing I make CLEAR in my policy for separated/divorced clients is that I am not a mediator, a family therapist or counselor so do not treat me like one, in the program parents are to provide a united from, be courteous and respectful of each other and not talk negatively about the other parent, they are to figure out a communication system and payment schedule between each other in private that ensures that all policies in the program are followed and so forth ~ failure to follow these expectations and the contract for service will be terminated immediately and the security deposit forfeited ... I do not want to be dealing with 'dad was suppose to pay this week' and other negative stuff ~ figure it out at HOME and ensure I am paid on time!