Lease transfer process

I’ve done two through BMW which went smoothly, granted at that time AAA could process them and now the DMV has to. Yes, the wait stunk (3 hours in SoCal), but it’s primarily Porsche financial who has been a nightmare to work with. Sent unsigned and incomplete docs, and have completely gone dark and stopped responding to my emails. Frustrating and time-consuming enough to make me second-guess ever doing a lease transfer with them again.