4 ms·
https://en.m.wikipedia.org/wiki/Mail_cover https://en.m.wikipedia.org/wiki/Mail_cover > Since 2001, the Postal Service has been effectively conducting mail cov
by paulmd 3y ago
https://en.m.wikipedia.org/wiki/Mail_cover https://en.m.wikipedia.org/wiki/Mail_cover
> Since 2001, the Postal Service has been effectively conducting mail covers on all American postal mail as part of the Mail Isolation Control and Tracking program.[1]
https://en.m.wikipedia.org/wiki/Mail_Isolation_Control_and_Tracking https://en.m.wikipedia.org/wiki/Mail_Isolation_Control_and_T...