in Correspondence Chess
are not necessarily mailed
any longer. They can also be faxed
, or telephoned
for that matter
-- but that would be rather pointless
. In theory
they could also be hidden
in the personal ads
; but generally
they are mailed by standard old-fashioned Postal Mail
the moves is getting more and more common
However, most of the official tournaments are using ordinary Postal Mail or fax. International tournaments are generally organized by ICCF (the International Chess Correspondence Federation), and the national by the national organizations (such as SSKK for Sweden, or CCLA for the USA).
Now that everyone uses strategy books or advanced computer programs to make their moves, the concept is getting less and less popular.
World Championships in Correspondence Chess have been held by the ICCF since 1950.