I contacted a client this month for whom I filed an extension. Left (2) vm and sent 2 emails, one in June. I never received an email or a call back.
This client gave me tax info on Saturday, May 15th, late. I emailed back that I didn't work on Saturday eve or Sundays and we had to file for an extension because the tax info was received so late. He may not have been happy with that but all seemed fine during our phone call on the due date of Monday, 5/17, itself.
I met with a friend of this client who is also a client. This person brought up his friend out of the blue during the tax interview and said something to the tune of "I don't know if x is easy to work with". In hindsight, I should have asked what he meant with that... but didn't.
To stop spending my energy on this, I thought of calling this friend of the MIA client and saying something like that I haven't heard from Mr. MIA, I usually wouldn't call about this but I'm a bit concerned because he's usually responsive, do you maybe know if he's on vacation ... The last time I spoke with the friend of Mr MIA was about 2 weeks ago when he referred someone else to me.
In general, I never talk about a client with another client. And this is my hesitation about a phone call to the friend of Mr. MIA. Let me know what you would do in this case.