Quote from @Chris Barrett:
You have no security in that type of loan however, if the deal falls through and the loanee loses the EMD you have to go to them to get money from them that they probably don't have.
If you mean security backed by collateral, you are correct. However, some security comes in the form of having joint control of the transaction. As I mentioned above you are JVing on the deal when you bring in the EMD. So if you sense the deal is not going to go through within the diligence period you can cancel the contract. There are several people in the group that have run into that issue but rather than cancel the deal they brought in the buyer and took a bigger cut of the deal in the form of a "Finders Fee".
Correct me if I am wrong, but I believe the points you are trying to make are the following:
Could you lose your EMD money?
Yes
Is the EMD backed by collateral?
No
If you lose your EMD money could you get it back?
Probably not
As you already know, there are no guarantee's with investing which includes lending.
***NOTE*** I am not trying to talk anyone into doing EMD lending. I just saw a questions that looked like it hadn't been answered so I thought I would try and be helpful and answer it. This might sound rude (it isn't meant to be), but it makes no difference to me whether someone decides to do it or not. I just wanted to share my knowledge on the subject and help clear up any confusion.