Osa Martin, a 76-year-old Nigerian residing in Carthage, Missouri, United States, has been convicted by a federal jury for her role in a multimillion-dollar international advance-fee scheme orchestrated from Nigeria.

According to the US Department of Justice, and based on the evidence presented at trial, Martin embarked on international travel nine times between August 2015 and August 2016, claiming to be a representative of BB&T Corporation, a one-time banking and financial services firm based in North Carolina.

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While on the trips, Martin, with the help of her co-conspirators based in Nigeria, met with several victims of the scheme, making them believe she had multimillion-dollar investment agreements with BB&T.

She then went on to sign investment agreements, purportedly on behalf of the corporation, and then made several fake visits to US embassies to make the victims believe that the US Department of State was authorising and sponsoring the investment agreements.

On each trip, Martins, under the false pretence that the cash payment was a fee charged by the US Embassy, collected $7,500 or more in cash from the victims.

After the visits, she further worked with other members of her syndicate to ensure the victims received fake receipts and documents bearing State Department seals.

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The victims were then induced to make large wire payments to bank accounts in the United States with the false belief that they were necessary fees before BB&T would release their investment funds.

On March 8, Martin was convicted of one count of conspiracy to commit wire fraud and one count of conspiracy to wrongfully use government seals.

She is scheduled to be sentenced on May 19, and faces up to 20 years in prison for the first count, and up to five years in prison for the second count.