CSA are becoming a pain

I'd suggest either that his ex is contacting the CSA every month with this information or it is due to a fault in their hopeless computer system.

Perhaps your partner could inform them that he will be taking legal advice on their constant harassment of him.

DO NOT give them your phone number, or they will start using that as well.

The other option is to contact your MP.

The CSA don't respond effectively to individual complaints, but they do have a unit designated to dealing with complaints passed to MPs.

It can be a pain for the otherside as well. My ex got a pay rise last April, only found out a couple of weeks ago by accident. He didn't tell the CSA, and they only recalculate from the date I contacted them, which I find very unfair.

does his ex have reason to believe that his wages change on a regular basis? is he on commission, for example? are you buying new things as a couple which would be visible to her - new car, TV through the front window when she's dropping the children off so she's assuming you have more money than you let on?

Not that it makes constant requests 'right', but she may consider she has good reason. Hopefully she'll realise it's not worth the hassle eventually....