Employees were familiar with the 86-year-old Bogart Road man when he approached their counter at about 3 p.m., according to a Perkins police report.
Employees said the man regularly frequents Walmart to wire large sums of money overseas.
When the man stopped by on Sunday, employees lied and told him they were out of the money cards he uses for the transactions, the report said. The man then became irate.
He later told officers he’d been sending money to “Joseph” in Nigeria to help him fix his truck, the report said.
Employees estimated the man has wired $17,000 over recent months.
The man’s daughter said the FBI is investigating the case, as her father has wired more than $100,000 since 2008, the report said.