A sensational corruption inquiry has concluded by claiming a 10th NSW Liberal scalp, with Port Stephens MP Craig Baumann sent to the crossbench amid allegations he took secret developer donations.

This brings to 12 the number of state and federal Liberal politicians who have resigned or stood aside following corruption inquiries this year.

One, Senator Arthur Sinodinos, told the Independent Commission Against Corruption on Friday he did not accept "any responsibility" for the NSW Liberal Party accepting donations from prohibited donors during the past state election campaign.

Operation Spicer, which concluded nine weeks of public hearings on Friday, investigated allegations that the NSW Liberals accepted money from banned sources before the 2011 state election.