Split couple house info

Please help. So my parents split in April messy breakup. The house is in both my parents name. My dad wants to get the house just in his name as he has full time care of the young children and my mum she’s no longer at the property nor does she have any contact with the kids. We have forms for her to sign the house over which she said she is willing to do. Do I just need to go around and get her to sign the papers? Or is there something more complex then that? Like do we need a third party witness ect ect please help