Why are American commemorative coins "authorized by the Republic of Liberia?"?

How is it that an African country 'authorizes' these American commemorative proofs? What exactly does it mean that they are 'authorized'? Why is this done?

They are not American commemorative coins, but Liberian coins. They have American themes to try to get Americans to buy them. Many countries cheaply let promoters say they are "legal tender", since the country knows nobody will spend them there, and it is free money to them. The promoters like it since a coin is not a coin unless it is legal tender somewhere, otherwise it is a medal, and there are a lot more coin collectors than medal collectors.

3 WTC 24KT GOLD COMMEMORATIVE COINS~TWIN TOWERS~PROOF $10.50

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Proof 1986S Statue of Liberty Commemorative Half Dollar $0.99

1982-S WASHINGTON 250TH COMMEMORATIVE HALF DOLLAR PROOF $87.77

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1983 US Olympic Silver Dollar Proof Commemorative Coin $24.75

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VERY CHOICE PROOF SMITHSONIAN COMMEMORATIVE DOLLAR $39.95

VERY CHOICE PROOF BOTANIC GARDEN COMMEMORATIVE DOLLAR $29.95

VERY CHOICE PROOF WHITE HOUSE COMMEMORATIVE DOLLAR $17.95

VERY CHOICE PROOF U.S. CAPITOL COMMEMORATIVE DOLLAR $20.95

1986-S LIBERTY COMMEMORATIVE PROOF SILVER HALF DOLLAR $0.99

1997 Jackie Commemorative Proof Silver Dollar $90.00

1994 P "PRISONER OF WAR" $1 PROOF COMMEMORATIVE/BOX/COA $38.00

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1983 S "OLYMPIC-DISCUS" $1 PROOF COMMEMORATIVE/BOX/COA $24.00

1984 S "U.S. OLYMPIC" $1 PROOF COMMEMORATIVE/BOX/COA $22.00

1995 S "OLYMPIC" HALF $ PROOF COMMEMORATIVE/BOX/COA $16.00

1995 S "OLYMPIC" HALF $ PROOF COMMEMORATIVE/BOX/COA $18.00

1991 PROOF Korean War Commemorative Silver Dollar & COA $23.95

2010 P$1 Boy Scouts U.S.Mint Silver Proof Commemorative $44.99

1986 Liberty Silver Dollar &Half Proof Commemorative S $35.00

1974 David Ben Gurion Special Commemorative Coin Proof $15.06

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1992 WHITE HOUSE COMMEMORATIVE SILVER DOLLAR PROOF COIN $26.95

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2008 S Proof Bald Eagle Commemorative Half Dollar $9.99

2010-P Boy Scouts Proof Silver Dollar Commemorative $1 $45.95

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1982 George Washington Commemorative Proof Half Dollar $8.65

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1984 Olympic Silver Proof Dollar Commemorative US Mint $15.29

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Mexico 2005 $10 Mexican States Commemoratives 1st Stage Hidalgo 1oz Silver Proof Coin Mexico 2005 10 Mexican States Commemoratives 1st Stage Hidalgo 1oz Silver Proof Coin This Mexico 2005 10 Mexican States Commemoratives 1st Stage Hidalgo 1oz Silver Proof Coin is accompanied by a special purse printed cardboard, a sheet containing the same, and general information about the origin of the name of the State, the foundation of it, his shield, geographical location and general tourist ...

1986 2pc. Proof Statue of Liberty Commemorative Coin Set 1986 2pc. Proof Statue of Liberty Commemorative Coin Set You will receive: 1986 two-piece (Dollar & Half Dollar) Proof Statue of Liberty Commemorative Set in original government packaging. Coin Information: Coin One Denomination: $1.00 Mintage Year: 1986 Mint Mark: San Francisco, CA Coin Grade: Proof The obverse shows the Statue of Liberty standing over New York harbor with the Ellis Island Immigr...

2010 Proof Boy Scouts Centennial Commemorative Silver Dollar w/Box $54.95 Here is a 2010 Proof Boy Scouts of America Commemorative Silver Dollar. This commem celebrates the centennial of the founding of the Boy Scouts of America. The obverse depicts a Cub Scout in the foreground, with a Boy Scout and female Venturer in the background saluting. the reverse features the Boy Scouts of America's universal emblem. This commemorative silver dollar includes the original US Min...

2005 Proof Marine Corps Commemorative Silver Dollar w/Box $55.00 This Proof issue shows the historic raising of the flag by the Unites States Marines on Iwo Jima in 1945, on the Obverse, and the emblem of the Marine Corps with the inscription "Semper Fidelis" on the Reverse. The Marine Corp Silver dollar is struck out of .900 fine silver with a net weight of 26.73 grams. This Proof Silver Dollar issue was struck at the Philadelphia Mint. This coin is in the ori...

US Commemorative Dollar Proof 1989-S Congressional Golden Eagle Coins specializes in a wide variety of Gold & Silver Bullion Products. Our large inventory caters to both the Bullion Investor as well as the collector. We offer every date and size of American Gold & Silver Eagles and carry large quantities of Canadian Maple Leafs, Krugerrands & Silver Bars. Feel free to use our site for all your indications of the Gold & Silver market. Our quotes co...

Encyclopedia of U.S. Gold Coins: 1795 - 1933, Circulating, Proof, Commemorative, and Pattern Issues $19.98 ...

Encyclopedia of U.S. Gold Coins 1795 - 1933 Circulating Proof Commemorative and Pattern Issues - 2006 publication. ...

Encyclopedia of U.S. Gold Coins, 1795 - 1933 Circulating Proof Commemorative &Pattern Issues - 2006 publication ...

1986 2pc. Proof Statue of Liberty Commemorative Coin Set 1986 2pc. Proof Statue of Liberty Commemorative Coin Set You will receive: 1986 two-piece (Dollar & Half Dollar) Proof Statue of Liberty Commemorative Set in original government packaging. Coin Information: Coin One Denomination: $1.00 Mintage Year: 1986 Mint Mark: San Francisco, CA Coin Grade: Proof The obverse shows the Statue of Liberty standing over New York harbor with the Ellis Island Immigr...