[Avodah] How does Prozbul work?

[Lisa Liel via Avodah]

I think a better question might be: will prozbul still work when shmitta 
is d'Orayta again?

On 9/11/2015 7:03 PM, Zev Sero via Avodah wrote:
> I have been asking this question to various people, and several have
> suggested that the answer is somewhere in the range of "hefker bes din"
> and "amiraso legavoah kimsiraso lahedyot".  IOW, beis din doesn't need
> to make a kinyan; its inherent power is sufficient to take possession
> of your loans as soon as you verbally relinquish them.
>