Junk mail is a paper note in Fallout 76.
Location
The note can be found in a mailbox in Charleston during Recruitment Blues.
Transcript
CASH PRIZE NOTICE!
ROCKWELL CLEARING HOUSE
WALLAH WALLAH, WA
CURRENT RESIDENT
1203 Grape Street
Charleston, WV
Gallery
.png "Charleston (mailbox - junk mail).png (2.66 MB)")