my son lives with me from friday 2.30pm to monday 9.00am (3 nites and i have a court order stating we have shared residency) and spends the remainder of the time with his mother, she has just set the csa on me after 8 years of a mutual agreement because of a disagreement. they rang me tonite and said I have to start paying, I have allowed her to keep all of the benefits (even when he lived with me for 6 months and she only had him 2 nites a week) as she doesnt work so she claims his child tax credit and child benifit (even though we are entitled to them too as we have a dependent child and me and my partner are on a low wage) and now I have to pay maintenence. this to me seems unfair as I have him all weekend, I take him allover and buy all of his clothes. she gets all the benifits and I have to pay maintenence all because she has him 1 extra nite and she never takes him anywhere or buys him anything? doesnt seem fair to me.