German ex-President Christian Wulff has gone on trial on corruption charges in an attempt to clear his name of allegations that helped lead to his resignation.

Wulff is charged with accepting favors while in office. In April he rejected settling his case with a fine, insisting he was innocent.

Heading in to Hannover state court Thursday, Wulff told reporters "I am completely certain I will dispel all accusations because I always acted correctly in office."

Wulff resigned in February 2012 following a barrage of allegations, including that he received a favorable loan and hotel stays from friends when he was governor of Lower Saxony state before being elected president in 2010.

He stepped down after Hannover prosecutors asked Parliament to lift his immunity so they could start a formal investigation.