Postal Rate Transition Act

Postal Rate Transition Act - Prohibits the U.S. Postal Service from requesting the first rate increase for first-class postage after enactment of this Act until reporting to Congress on: (1) the number of one-cent stamps printed to facilitate the first-class rate increase implemented as of January 10, 1999; (2) how the U.S. Postal Service determined how many of such one-cent stamps should be printed to facilitate such implementation; (3) the number of one-cent stamps that would have been printed during calendar year 1999 if such rate increase had not been implemented; and (4) the cost of printing them.

Prohibits the U.S. Postal Service from implementing the first rate increase for first-class postage recommended by the Postal Rate Commission after enactment of this Act until reporting to Congress an estimate of the number of stamps at a compensatory price that need to be printed to facilitate the rate increase.

Prohibits the U.S. Postal Service, with respect to the first increase in the first-class rate after enactment of this Act, during the 30 days following the first day of such increase, from: (1) failing to accept first-class mail weighing one ounce or less because a 33-cent stamp is used for such mail; or (2) selling any 33-cent stamps.

Applies the same prohibition and requirements with respect to a postcard for which a 20-cent postage stamp is used.

Requires a report to Congress on the number of stamps printed to facilitate such rate increase, with related price information.