Confused on wholesale process

[Giorgios Katehis]

I'm sure this has been asked but I'm still confused on the closing process of a wholesale deal.. 

-bring purchase agreement and assignment to title Company

-meet on closing day 

My questions are what do I bring on the closing day, and when does the buyer pay. I've seen people say that they wire the title company the money, and I get paid from them 2 weeks later. And I've seen people say I get paid on the day of closing. 

For the closing day I've seen people say I get "HUD" two weeks later and I bring that? Anything helpful is much appreciated