Sandra Lee Taylor, a contract worker for Canada Post in Saskatoon, Saskatchewan, was fired after she opened a card rigged with an alarm device, the Canadian Broadcasting Corp. reported Friday.
In addition to wearing the bracelet for four months, Taylor must perform 200 hours of community service and reimburse a 9-year-old girl for the $20 stolen from a birthday card.
Authorities reportedly began to suspect Taylor after receiving complaints of undelivered mail that centered around the routes where she worked.
Investigators found more than 1,000 items at her house, including checks, birthday cards and wedding invitations.
Canada Post has sent the letters on to their intended destinations, accompanied by letters of apologies.