Black out notice returned

Hello..

Plan is going into black out... notices have been mailed timely, however some are returned for former terminated employees.

What do you do if a black out notice is returned via USPS due to insufficient address?

Thanks!

I would save all documentation, and then do a typical missing participant search. The plan/plan sponsor/plan administrator hopefully has an administrative procedure for such and if not, now would also be a good time to develop one.

Thanks CuseFan.    That was my thought as well.