Dial-up shut-down letter

A dial-up shut-down letter,
which may also be called a dial-up shut-down mandate letter
or a dial-up termination mandate letter,
is a letter that is sent to an internet service provider (ISP)
that sells dial-up internet connection service,
by a domestic intelligence agency.

The letter orders the ISP to shut-down its dial-up connection option,
which is almost always only one of two or more different internet connection options.
The reason for this is that dial-up connections provide much more privacy than
other types of internet connections, due to their IP-address pools and slow connection-speed,
as is further explained in the article "dial-up connection".

Dial-up shut-down letters typically include a gag-order,
which forbids the recipient of the letter from telling other people that they have received the letter.

Most recently, the U.S. NSA (National Security Agency) has sent such a letter to
AOL (America OnLine), and it is scheduled to be implemented on september 30th of this year (2025).
The NSA had already sent meny of such letters to other, lesser-known ISPs,
which have already gone-into effect.