Thanks to the far-left leadership in the U.S. Congress, and the election of the largely anti-self defense, anti-gun Barack Obama as president of the United States (don't look at what he has said, look at his record), the U.S. Bureau of Alcohol, Tobacco, Firearms and Explosives is running out of Form 4473s.
According to the news release from the government agency, due to "unprecedented demand" the BATF is running low on these forms. They have given firearms retailers the go-ahead to make photocopies, if necessary. Uncle has the details and more links.
At least this is one agency that doesn't seem to think it necessary to get in the way of lawful commerce. For now . . .