Rahim Jaffer's company sought $100-million in federal funds for a bio-fuel project at the same time as his wife, MP Helena Guergis, then a cabinet minister, promoted the venture to officials in her riding, according to government documents.

The revelation is likely to fuel opposition allegations that Mr. Jaffer was involved in unregistered lobbying activities at Green Power Generation, which he co-founded after losing his Edmonton seat in the 2008 election, and his potential financial interest in Wright Tech Systems Inc. while his wife was promoting its BioDryer project to officials in Simcoe County.

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