RMD for Deceased Partic - Client can't find bene

Each year we seem to have a handful of RMDs for deceased participants. The client tell us they don't have a bene listed on file, neither does the fund family. The client also tells us they do not have a way to track down the family and can't assist. These are typically small plans. 

We haven't found a way to force the balance out of the plan and the fund families don't seem to have a process. 

Anyone else run into this situation? Thoughts? 

You might have done this...

I have had more success than one would think searching for an obit online.  It not only often times names the family but the church the service will be held at.   We have called the church and the pastor knows how to contact someone in the family and does it for us.