Investigators in Athens, Ga., say Demetrius Robinson filled out the application to kill time while waiting for the Golden Pantry store to empty of customers.
Authorities say it was Robinson who then produced a knife and held up the store last week.
The job application gave Robinson's name and an uncle's phone number, but a phony address.
Police arrested the 28-year-old man Saturday on armed robbery charges.
An official at the Clarke County Jail said Robinson remained in custody Sunday but did not know whether he had an attorney.