Long story short: ex was a useless dad and mentally abusive when my son was a baby. I left him. Massive control freak, only interested in our son when he could use it to manipulate or ruin plans for me etc He eventually got a new girlfriend (3 years ago) and hasn't seen my son since. He'd pop up once in a while demanding him, but by this point my son didn't know him, so I could tell him contact centre or nothing - he always chose nothing. Child Maintenance caught up with him, and he now has to pay me. Because of this, he's now decided that he wants my new partner to adopt him ASAP so that he can get out of paying. My son has autism and other additional needs, I am his full time carer (i'm now also home educating him), child maintenance is REALLY useful. My son knows my partner as daddy, and he is brilliant at it. He's been in the picture most of my son's life and really stepped up when the ex has done nothing but mess him about. I know that the reason he wants him adopted is just to get out of paying, but he's such a manipulative and petty person, if we don't go along with it, I expect he'll start trying to cause problems out of spite. But also, even if we do.. can he still come back later on even if DS is adopted by my partner? I would not be surprised at all if he eventually gets dumped by the girlfriend and then turns his attention back on us and starts trying to cause problems again. He'd probably go back to the courts and say we bullied him in to signing the adoption papers or something. I don't even know what i'm asking. But has anyone had similar situations or can advise please?