Not allowing dad to collect DS from nursery

[loie]

I'm not sure if this is possible to word this -

I tried to explain to nursery that I need a system in place where - unless I specifically say that DS is to be collected by his dad that day, that he isn't to be released to him, due to police involvement etc and we're in the process of going through lawyers.

They told me I need something in writing to take him off the contact list but obviously if I take him off the contact list then he can't collect him even on the days that I may say that actually he is coming to get him today and I authorise it, but I don't trust leaving him on the contact list as then he's able to come and collect him whenever he wants (which he would).

How do I put this in writing?

If he has Parental Responsibility you need a child arrangements order or he can just get him whenever

I work in a school and we cannot refuse a parent collecting their own child if they have legal parental responsibility, unless there is a court order in place