Corruption authorities have been asked to investigate $400,000 worth of donations a tobacco executive made to the Labor Party, potentially breaching NSW law and ALP rules.

Greens leader Richard Di Natale has written to the NSW Independent Commission Against Corruption asking it and the NSW Electoral Commission to probe revelations that Sydney tobacco company director Peter Chen made a $200,000 donation to NSW Labor in 2011 and another to the party's federal branch in 2013.

Mr Chen is the sole Australian director of ATA International but donated via another of his companies, Wei Wah, which retails the cheap Chinese brand cigarettes that ATA imports.

​The ALP banned donations from the tobacco industry in 2004. NSW law also bans funds from any "tobacco industry business entity", which includes "a close associate" of a tobacco corporation.