Delivery Of Second Stimulus Payments Underway

The IRS has announced the official payment date, although direct deposits began appearing in accounts last week. Checks were mailed out last Wednesday for those not using direct deposit. Some individuals may receive debit cards in the mail instead of paper checks, which will arrive in an IRS-addressed envelope.

What day did checks start getting mailed out to people not receiving direct deposits?

How are the envelopes containing checks addressed?