Polygraph and lie-detection information for the public and the profession from Polygraph Examiners Of America. www.PEOA.us and 818-883-6969
Most would say that such an offer BEFORE the testing would be a bribe, but just a thank you for good work if offered afterwards.
Polygraph client reports that a southern California polygraph examiner offered to pass him for $1000He said that price was given when he told the examiner his girl would break up if he failed99% of legit examiners would not take or solicit a bribe.
https://polygraphliedetection.blogspot.com/