“It has been used a number of times in American history (especially after the Civil War). Individuals don’t need to be individually named or charged.”
In fact, amnesty and pardon to Confederate soldiers after the Civil War required that many had to make personal and individual requests for amnesty. They also needed to swear fealty to the United States and explain their actions before the war commenced and their actions during the war.
Amnesty Under Johnson
wnc.omeka.chass.ncsu.edu/exhibits/show/confederateamnesty/amnestyjohnson