You can put 2 signature fields on the form today, and indicate that one is for “Parent 1” and one if for “Parent 2”. But it gets tricky because each parent will have to login separately in order to sign this form. Then if the child only has 1 parent, you won’t be able to require the 2nd signature, and what if the child has 3? I would talk to a legal counsel and see what you can do with our system as it is.