Disgraced former federal MP Craig Thomson faces being struck off as a solicitor on grounds he is "not a person of good fame and character" over the scandal that saw him use union credit cards to pay for sex and personal expenses.

Thomson, 53, was convicted in 2014 of 12 counts of theft and fined $25,000 after he spent more than $5000 on escorts and restaurant meals while he was national secretary of the Health Services Union between 2003 and 2007.

Former Labor MP Craig Thomson outside court in 2014. Credit:Pat Scala

He was elected the Labor member for Dobell in the 2007 federal election, serving as an MP until he lost his seat to Karen McNamara in 2013.

In March this year, the Prothonotary of the Supreme Court of NSW launched proceedings against Thomson that seek to have him declared guilty of professional misconduct and found "not a fit and proper person to remain on the Roll of Legal Practitioners of the Supreme Court of New South Wales".