Wholesale HUD Contracts

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Hello everyone. I'm just getting started as a virtual wholesaler. 

I live in California and I have interest of bidding on the HUD Home Store website.

I understand that HUD doesn't allow "and or assigns" to the contract, but I can add a buyer.

This will satisfy the A to B closing, but how do I collect my assignment fee from the cash buyer? 

Is there a grant deed contract that must be executed here?

Please go easy on me, I'm new to this. 

Thanks