My best friend has a daughter who is 8 years old. Her dad picks her up from school for contact and I noticed a few times that he didn't have a car seat for his DD so I mentioned it to my friend. He'd been using a booster since they separated when their DD was 2 anyway which my friend had been unhappy about. She'd noticed before he started collecting from school that he didn't have a car seat once and offered to lend him hers and always made it clear she'd rather he borrow hers than let DD travel without one. My friend only lives five minutes from school.
When I told her she said what can she do? The contact is court ordered. I said personally I'd insist on pick up from home so she could check he had a car seat for her. My friend said this wouldn't stop him not using one for the rest of the weekend, which I'd true but I feel so strongly about car safety (close family member lost their child)that I'd stop contact over it as I feel it's neglectful parenting.
Their DD is about the same height as mine at around 123cm so should still be in a high back booster, in my opinion. Aibu to advise my friend she shouldn't let this continue?