Is there any difference among the many agents offering Thai Elite? Anything to watch out for?

Hello !

We are going to buy a Thai Elite visa for 10 years.

We were in contact with an agent who sent us the form and requested our passport size photos.

The problem is when I asked him to which address I should send the original documents, he gave me a different postal address from the one on the official Thailand Elite website (at Bhiraj Tower). Then I realized that I was actually dealing with a travel agency called Discover Thailand Co.,Ltd. The agent is using a Thailand Elite signature in all of his emails...but he's working in a travel agency... Their website says that they are ''authorized thailand elite visa sellers''.

I'm suspicious: can elite visa appliance be made by any other company than the official Thailand Elite visa company?