WWYD? CSA arrears payment?

[NotaDisneyMum]

The CSA have finally sorted out DPs CSA assessment based on his first job after 12 months of unemployment- it's taken 4 months, during which time ex hasn't been receiving anything (despite DP suggesting they enter into a private arrangement, when he was unemployed, she insisted on sticking with the CSA so that "she gets what she is entitled to".
There is an arrears to pay - which DP can negotiate to pay off in instalments or pay as a lump-sum (on my credit card which we'll pay off over a few months).

I've suggested that he ask his ex which she would prefer him to do - whether she wants the lump sum, or would prefer a bit more every month for the next few months.

Has anyone else involved their DSC mum in this decision?

[ivykaty44]

olibean - are all the facts in this thread?

[NotaDisneyMum]

ivy I'm pretty sure all the facts are there - although some posters are obviously unfamiliar with the CSA maintenance procedures and therefore assumed that I owed the arrears.
Hopefully, that misunderstanding has been resolved now