"Canada Revenue Agency data appears to indicate that a significant number of applicants have filed incorrect tax information with respect to the nature of their income," DFO spokesperson Barre Campbell told CBC News.

Travis Nickerson of Clarks Harbour, N.S., received an overpayment letter.

"It's a mess," said Nickerson, a lobster boat crewman. "They gave me something when I really needed it, and now they want it back."

Nickerson is paid a share of the catch and saw his income drop in the first half of 2020 when COVID-19 crashed demand for lobster worldwide.