I wanted to enroll my kid to a family daycare (licensed). STBXW disagreed.

She enrolled my 4 yr old in different daycare and not disclosing that to court so that she can allege that I am not cooperative and gain sympathy and advantage. She has also not asked me for any payments as of now.

If I ask daycare, they would not give me documentary proof since ex did not disclose to them that I am a father with joint legal.

How can produce documentary evidence to submit in court about child’s enrollment in daycare without my knowledge?

Edit: ongoing divorce (not final) in NJ.