Alberta's chief electoral officer is investigating allegations that senator-in-waiting Doug Black broke election fundraising laws by soliciting donations in British Columbia last year.

Brian Fjeldheim is investigating a complaint laid by Vitor Marciano, a Wildrose candidate in last spring's senate election, about a letter from October 2011 that was distributed by former federal cabinet minister David Emerson.

Doug Black received the most votes in last spring's senate election. (dougblack.ca)

"Some friends in British Columbia sent me copies of a letter that was circulating amongst high-value political donors asking for political contributions to Doug Black's senate campaign," Marciano said.

Fjeldheim responded in April shortly after Marciano laid his complaint, stating that his office responds to all allegations and reports of contraventions of the Election Finances and Contributions Disclosure Act.

However, in that same letter, Fjeldheim told Marciano that Alberta law prohibits him from releasing his findings.

With files from the CBC's Charles Rusnell