From thread link I posted earlier from OP report January annual extension CW....
"I was not asked for TM30 on any other documents. I don’t know if it was checked, but my last 90-day receipt was attached to my passport."
Just shows how variable offices can be.
BTW I have never done a TM30 in my 12 yrs at CW.
I notice now CW require TM47 for annual extension.