My ex hasn't paid a penny in cm for 6 months and has always been on and off about paying over the 12 years we've been separated.
I've just received the annual calculation and it's a joke. I know he works full time (labouring), he rarely visits DS (14) because he's working yet they (the cms) think his annual income is only £3200, £61 a week!
The process of fighting this looks hard especially as I have no proof other than what he tells me and my Son. I don't even know his address (he visits Son here for a couple of hours once every few months at best - he lives in South London I live in Hertfordshire.)
Any help or advice appreciated.