You will need to find a member with points that will meet your needs - both in the useful life of the points (will they be valid for the dates you want to travel) and in the number you need. If you need additional points for your Home Resort for a reservation made using the 11 month priority, you will also need to find a member with points available for that specific resort. For reservations made within 7 months, points from any resort will be fine. If you need 50 points, it may be difficult (but not impossible) to find someone willing to transfer that few points but you may find having a few additional points (which can be banked into the next Use Year) a good experience for the future.
Once you have found a member willing/able to transfer, they will need your name and
DVC membership number. The number is needed to transfer the points into your account and that is what MS requires. In the past, MS also wanted the home address of the receiving member - but the last few times I have transferred, that was not requested - only the name and member number. Once the points have been transferred, the other member will be given a confirmation number which they should share with you as a reference. You will likely need to call MS to confirm that the transfer has been completed and will also need to call MS to have access to those points to make your reservation(s).
As for safety - please be sure you are comfortable with the member you are working with as many/most will insist on full payment in advance. Since transfers are an irrevocable transaction both sides need to be comfy with the transaction.
When I have transferred points to other members, I give them my name along with a link to the appropriate government site where they can confirm that I do own DVC points at that resort. Once payment has been received (Paypal is the fastest but personal check would also work) I call MS, make the transfer, contact the other member with the confirmation # and ask that they check with MS to confirm that the points are in their account.
If a personal check is accepted, realize that it can take 10 days - 2 weeks for the bank to confirm that the check has cleared and I would not make the transfer until that has been confirmed.
IMO, since the transfer completes the transaction, it should be at a lower rate than a rental since there are no other responsibilities for the transferring member (no DME, no
DDP, no room requests, etc.) and that certainly makes the total transaction simple. However, that policy will vary from member to member.
The DIS R/T Board has NEVER had a problem with a transfer but it is still worthwhile to review the suggestions in the **How to use this Board** thread about finding a member to work with.