Hi guys, I am a novice as far as Internet business is concerned. I belong to Australia. I recently got an offer from an advertiser asking me to put up his site links on my site for a period of 8 months. I am not very sure about the offer. I am not completely convinced. He even told me that he will pay me in advance. However, I am still skeptical about it. This guy is not from Australia. He has also asked me for an invoice. Do you think I require government registration to do the needful? Please help!