sorry another thread from me 
stbxh paid his first payment on 1st October, he paid it into the joint account which he knows has a block on it as it is under dispute because when a non-mol/occ order removed him from the house in June, to ensure that all the bills were paid I transferred the direct debits to my account where my salary was paid into instead of the joint account, he used the joint account and made the account go overdrawn by over 200, so I put a block on the account so that no money could be extracted without both of our permission.
I had a call from CMS yesterday because the 2nd payment has been paid into the joint account, he is being difficult and I advised the man that he knew the correct account to pay the money into and could he do something please? He said that stbxh had called this morning and said there was a changed in his circumstances. To cut a long story short, I believe that he is saying that his salary has reduced by 25% which is why the circumstances have changed as through careful questioning he admitted that this could have a detrimental effect on the money received for my children.
I believe that he is now getting his employer to pay him through his own consultancy company which means that his "drawings" will be alot less.
My solicitor says that when we get to court this will come up because it won't make sense that he's suddenly taken a drop in salary or that he's suddenly been paid through is company and that he will have to make full disclosure about his company and assets anyway.
Any thoughts/words of wisdom from you lovely people out there?