Maurice William McClintock (33) was eventually caught after a sting operation mounted by Royal Mail bosses.
An integrity test — commonly used in cases where postal workers are suspected of interfering with mail — was set up. It involved posting test letters, which contained cash notes whose serial numbers had been recorded, in an attempt to catch him out.
Omagh courthouse heard that four test items — greeting cards which contained money — had been prepared and were posted outside Castlederg Post Office on April 22 last year.
The items were deliberately placed at that location in the knowledge they would be collected by McClintock. Two of the test letters, containing £20 and £25, subsequently went missing.
Cash notes were later found in McClintock’s possession, and their serial numbers matched those of the notes which had been placed in the test letters.
The court heard that, when confronted with the evidence, McClintock made “a full and frank admission”. He admitted taking both letters and also confessed to stealing “25 to 30 other letters”.
While some of these had not contained cash, he estimated the letters were worth around £200 in total.