The comedian Sacha Baron Cohen has been called many things during his years of embarrassing celebrities on camera — and he can now add “evil,” “exploitative” and “truly sick” to the list.

Sarah Palin, the former vice-presidential candidate, said on Tuesday in a lengthy Facebook post that she and one of her daughters were “duped” into apparently appearing on the British comedian’s new TV series.

“Yup — we were duped. Ya’ got me, Sacha. Feel better now?” Ms. Palin wrote, saying she was a “victim” of the comedian for the Showtime series “Who Is America?,” which debuts on Sunday.

Ms. Palin said she was invited to appear on a “legit Showtime historical documentary.”

She was interviewed by what appeared to be a disabled veteran in a wheelchair, who she assumes was Mr. Cohen in disguise. He peppered her with questions, she added, that were “full of Hollywoodism’s disrespect and sarcasm.”