Co-parenting is generally understood as a parenting arrangement in which the parents are not romantically involved. As a child can only have up to two legal parents in English law, this can create issues around who will obtain legal parenthood in multi-adult cases and who will be named on the childs birth certificate. Legal problems can also occur around the acquisition and exercise of parental responsibility for the child, which governs decisions for the day-to-day welfare and upbringing of the child. A written co-parenting agreement, tailored to your situation, is an important tool if you are entering a co-parenting arrangement. It will establish the ground rules for helping manage the complex legal aspects in practice, as well as the expectations involved. Whilst the courts paramount consideration is the welfare of the child, a co-parenting agreement can be of important evidential benefit of what was intended, understood and agreed between the parties.