FBI spokeswoman Laura Eimiller says 43-year-old Peter Omagbemi, of Nova Scotia, was one of several people who allegedly sent realistic-looking correspondence to targets saying they'd won money in a lottery, sweepstakes or class-action settlement.
The hitch was that victims were told they had to pay fees or taxes, and many did.
There were over 500 victims, many of them from various parts of Southern California.
Omagbemi was charged with 17 counts of mail and wire fraud in 2009 and had been a fugitive since.
He was arrested last week when he crossed the border into the United States in Calais, Maine.