The former Governor of Alaska made the error in a speech that accused President Obama of "telling lies" after speaking at length about the abuse of truth in US politics.
Palin later poked fun at herself on Twitter, writing: "Doggone it! That explains why my Christmas cards keeps (sic) getting returned!"
The politician made headlines with her infamous gaffes during the 2008 presidential election when she supported John McCain on the campaign trail.
Palin appeared to be unsure of what the role of vice president would entail, and could not name any newspaper she read when questioned by a reporter.
In 2011, she said that the US should stand with "our North Korean allies" in a radio interview, appearing to confuse North and South Korea.
Most recently, she called fellow ex-governor Jesse Ventura a "jackass" and used an analogy comparing Obama to a domestic abuser harming his "battered wife", the US.
- UK Independent
