Au Pair.. Help

Hi, Please give me advise in my situation now. I registered in easy au pair site looking for a job in any country, but i am having doubt if he is a real employer or fake one? Last Nov he sent a message that he need me as an au pair of their family and send me the photo with the adress and even the duties and responsibilities that i need to do. I got a doubt because in two mails that he sent there was agency mentioned but in different names. Now I asked him in mail which one is real agency? now the agency sent me the requirements that i need to forward to them and after that they are asking me to send the money through western union so i replied to them that the half of the processing fee will be in the cost of my employer. The agency replied to me that they are going to contact my employer for the half of the processing fee. I got a doubt why i need to send in western union? Please help me if this is a scammer?

Hi lei and welcome to Scamwarners

This is %100 scam. There is no agency that would ask to pay in advance using Western Union. Please, cease all the communication with the scammer.
Check this thread
viewtopic.php?f=3&t=3232

Also, it would be of a great help if you can post all their emails with the headers if it's possible after you move your personal details.
If you don't know how to find the headers, just ask