First off, you wont' ever be speaking to "the people who own duetche alt a securities loan trust " - because those owners will be teachers, firemen, etc across any number of mutual funds/etc.
You will eventually be hearing from the servicer on behalf of the trust. But let's back up a second.
Is your goal to get your relocation money and move on? Or would you like to stay in the home?
In Cali, all owners (banks when they foreclose, as well as families when they buy their first home) take the property subject to the rights of the tenants in possession. Do you have a written lease (actually sublease it sounds like)? If the lease is a valid, arms-length agreement and you have been making your payments timely, that may be a valid defense to any eviction proceeding that could come since you aren't paying rent to the actual owner. If the lease term has expired and become 'month to month' you have I believe a 90 day notice requirement from the new owner to terminate the lease. I probably wouldn't rush to receive it sooner.
Someone who is not in possession (the previous tenant), that whole transaction between them and the servicer really has nothing to do with you. But I wouldn't worry about the former tenant receiving 'your' relocation incentive: typically that payment is made at move out by the tenant when the keys are turned over and the property is vacant.
Hope this helps.