I have rented points several times when I know I would not be going to Disney or use the points elsewhere.
First, if you transfer points to another member the transaction is permanent. You cannot recup the points. When I transferred points I requested half payment and the balance at the completion of the transaction. There is an element of trust for both parties in this type of transaction. I have executed this type of transaction successfully several times.
Second, when I rent my points I request that the party pay half when I confirm the reservation verbally and the balance when I send the written confirmation. In addition I also use a simple lease form more for the comfort of the renter since they are sending a sizable amount of money on trust.
The renter can access the reservation via member services once you have a confirmation number. You should not distribute your membership number to anyone even when you are transferring points.
Third, it is advisable to establish a paypal account it faciltates the transaction. Also, as the owner you controll the reservation and it can be cancelled if the renter does not pay the balance.
Thus far my experience has been very positive and I have met very nice people via this process. Any serious renter knows they are getting excellent accomodations at excellent prices. And, the renter is now able to obtain the Disney Dinning Plan effective April 1st, which seems to be a good deal.
In my opinion there is more of a risk renting the points since the owner controlls the points. The renter can check with the Orange County Comptrollers office to ensure you own at Disney since it is recorded there.
I hope this information helps and good luck renting your points.