Welcome to Just Answer
I am a Solicitor and will assist you.
From the description that you have provided - it is my understanding that you previously had a court order in respect of the matrimonial finances that included a provision for child maintenance.
If the order was made post the 03 March 2016 then either party can opt out after a period of 12 months and apply to the Child Maintenance Service (new name for CSA) instead. I am presuming that your order was made after this date as you have already taken the step of reverting to the CMS.
You cannot therefore seek to enforce the order in respect of the element relating to child maintenance as you have opted out.
It is correct that the CMS will charge fees if their collection and payment service is to be utilised.
To avoid the fees, it can be agreed the the monies that the CMS have calculated should be paid to you by the father can be paid directly to you to avoid these fees, if you are confident that the father will pay. The father will have to pay you this directly and cannot demand that you also have to pay money into a certain account.
Let me know if I can help you further
Please kindly remember to star rate our service so that we receive credit for helping you today