Bersih will also go on a nationwide campaign aimed at achieving a 100 percent voter turnout in the forthcoming election.
The campaign themed "Jom 100", will kick-start after the Chinese New Year holidays.
"If there is a larger number of voters, it will also mitigate the effects of election fraud and gerrymandering, because there are only so many phantom voters who can vote," she added.
Ambiga also urged overseas voters to come home to vote as they have been denied the right to be registered as absent voters in a legal bid recently.
She added that national laureate A. Samad Said is appointed Bersih co-chairperson and student activist Shukri Abdul Razab as a steering committee member.