Assignment of Bid - How does this work?

[Daniel E.]

Purchasing a note just before auction. The foreclosure attorneys have said they will do an 'assignment of the bid' at sale. How does this really work? 

Here is my understanding. Please correct me!

1) Close the purchase of the note. Record AOM (does this even need to be recorded at this stage?). Sheriff sale in three weeks.

2) Contact lawyers and tell them you are the lender (foreclosure case still in original lenders name). Provide opening bid at your reserve.

3) At the auction, someone bids above the reserve. 

Then what? The original note seller 'assigns' me the proceeds? The lawyers do? How do they even know I am the lender? Is someone verifying the AOM, allonges, etc. at this stage?

I just do not understand what the "assignment of the bid" really entails. 

More preciously, how do we go from the winning auction, to 'assignment of a bid', to getting the money to my bank account?

Thank you in advance.