Kaohsiung Railway Station recently received cash, including Singaporean dollars, from two passengers who evaded paying fares years ago and wanted to make it up, the station master said on Friday.
A man surnamed Wang (王) sent NT$3,000 (US$100) and a note from Changhua County in central Taiwan, saying he was sorry for traveling by train without valid tickets during his military service in the past, Chen Wen-chuan (陳文川) said.
The station tried to contact the man via the cellphone number left in the letter, but could not reach him, the official said.
A similar piece of mail was handed to the station in late September, with $S50 (US$39) and a letter inside.
The letter was from a female passenger who said she felt guilty for not paying the train fare years ago and wanted to apologize by paying back the money, Chen said.
The woman said she asked a friend to deliver the letter for her.
The station master said all the money would be turned in to the Taiwan Railways Administration, with the Singaporean money exchanged for New Taiwan dollars first.
The station receives such mail once in a while, but is often unable to find the senders, Chen said.
Passengers who do not travel with valid tickets are subject to a fine of 50 percent of the original ticket fare, according to the administration.