Agent will follow sellers instructions. If it is an REO, the bank may want to see the highest one only or the highest three or the highest five. Rarely do they want to see all offers if there are more than that.

Short sale, probably just the first one or the highest one.

Short sale contingent: offers usually just held in file cabinet by the listing agent unless contract buyer cancels.

Your question is unclear.

If you're doing a short sale, you can send whatever you want. Remember: A short sale is a transaction between a buyer and a seller. The contract is contingent upon approval of the lender. So let's say a seller gets a short sale offer. His/her first step is deciding whether he/she wants it. (Doesn't make a whole lot of difference, since the lender won't allow the seller to walk away with any money.) The contract is signed. Then the signed contract, along with the other documents in the short sale package, are sent to the lender for its approval or disapproval.