Does anyone have a solution when the client is older, retired before you had to go online, so there is no email address linked to the account, or just do not have a computer or cell phone?

Has anyone used the Form 4852?

Some clients received them in the mail (about 5% or less).  

Calling OPM is a waste of time as they hang up "too many calls".  I've called the US Senator's offices and was told go online.

Help???  Please!