MPs are usually given the opportunity to give a valedictory speech when they retire, but National staff says he has declined a speaking slot today and instead will release a farewell written statement tomorrow.
Many around Parliament believe Mr Clarkson chose the written word because he feared his mouth might run out of control on him, especially if he was baited by his political sparring partner Winston Peters.
Mr Clarkson ousted Mr Peters out of his Tauranga seat and the pair have continually baited each other ever since.
While he did prise Tauranga off Mr Peters, the self-made millionaire's tendency toward "colourful" language was not a bonus, as it opened him up to personal attacks.
He was in trouble before even elected, with sexual harassment allegations against him publicised by Mr Peters in the 2005 election campaign.
"She overheard me say `I bet my left testicle the All Blacks would win'.This is a girl who was using the f-word and yet she was offended by that."
Mr Clarkson managed to arouse further interest in his groin by clutching it in front of a female TV3 reporter, proclaiming his "crotch was so sore".
By 2006, Mr Clarkson, 69, was railing against Muslims and gays, and saying he barely tolerated Parliament.
He took a swipe at the gay community saying "I've got nothing against homosexuals and lesbians as long as they're doing it in their own house, but if you try to ram it down my throat, look out."
Mr Clarkson is not the only National MP who declined to make a farewell speech.
Brian Connell, who was suspended from the caucus in 2006, decided that since he had nothing nice to say about Parliament, he would not say anything at all.
Mr Connell's time as an MP was marked by his outspoken comments and battles with all National leaders.
He has already left Parliament to take up a job overseas.
