[sharkweek]

When I owned a small business every letter from the IRS, no matter how benign, was nightmare inducing.

Never got anything serious from them as most were “we’ve update some random piece of info on your profile” notifications, but still made me nervous every time.

[rietta]

Same! I regularly get address change notifications from the IRS in duplicate despite nothing visible changing about the address.

[Ylpertnodi]

Wouldn't anything really, really legal be recorded delivery?

[skeeter2020]

from experience - no. Requests for more info (the precursors), reassessment notices (the nightmares), bills (the consequences)