A witness has told the NSW corruption watchdog she told "lie after lie" about donating to the Labor Party at the request of her boss, who is accused of participating in a scheme to hide an unlawful $100,000 donation.

Teresa Tam, a casual waitress at the Emperor's Garden restaurant in Sydney's Chinatown, is the latest witness at the Independent Commission Against Corruption to admit she signed false declarations claiming she donated $5000 each to NSW Labor and Country Labor before the March 2015 election.

Former NSW Labor MP Ernest Wong and Ms Tam's boss, Jonathan Yee (right), in March 2015. Credit:Facebook

Ms Tam's boss, Jonathan Yee, had close ties to the NSW Labor Party. He sought Labor preselection in 2012 to run as the party's candidate for Sydney lord mayor and later ran unsuccessfully as a Labor candidate for the City of Sydney council in 2016.

Ms Tam gave evidence on Tuesday that Mr Yee told her she should lie to the ICAC when it summoned her and her husband to private hearings before the watchdog's public inquiry this year.