The president of Fiji's Law Society says the Fiji Independent Commission Against Corruption, or FICAC, is acting outside its area of responsibility.
Dorsami Naidu made the comments after FICAC charged a Fiji member of the International Commission of Jurists, Imrana Jalal, and her husband with operating a restaurant without a licence.
Ms Jalal denies the charges.
Mr Naidu says anti-corruption organisations usually deal with corruption matters involving public bodies.
"FICAC should not have become involved. This is dealt with by the municipal council and if a person does not pay their business licence fee and if they have operated, the municipal council can take them to court and claim that money. I can't call it corruption."
Dorsami Naidu he doesn't understand why FICAC has become involved, but adds the Commission seem to single out people who are critical of the regime.
A magistrate questioning FICAC over the matter has been sacked with no official reason given.