Currently i transfer DP's child support privately, have done so for years & have no intention of discontinuing. (I do all our finances DP is hopeless with money lol)

DSD's mum has now decided she wants to go through CSA, which is fine with us. However, DSD's mum does not know where we live as she is quite immature and likes to do stupid things (at our previous address she would constantly go by when we were both at work and harrass our dogs...we couldnt figure out what was wrong with them until we asked the neighbours if they had seen anything...) and we dont want her knowing what he earns as she is a gossip and things end up being said to mutual friends and drama is caused.

SO. My question is, do we have to fill out the form she keeps giving us or can we deal with CSA directly? DP has told her several times to call CSA give them our number and they will call us, but she refuses to do it that way and insists we fill out this form, which makes me think she doesnt really wish to go through CSA she just wants information?

Secondly, DP is casual so if he doesnt work he doesnt get paid. Going off his 08/09 Tax Return it states he earns a huge amount which is going to push the payment up a lot. The huge amount includes working public holidays and when other staff members go on holidays DP often works for a few weeks with no time off. We predict the next few months are going to be quiet as his place of business is quiet therefore his hours are being cut back. Plus there is a two week block in August where he wont be working at all and my pay covers JUST all our rent/bills etc. Do we still have to pay if he is not working therefor not getting paid for 2 weeks?

I just wanna do the right thing without giving her too much information if possible...any help would be great! I know there are a few CSA/CL experts among us