The joint operation, conducted by the Singapore Police Force, Immigration and Checkpoints Authority (ICA) and Singapore Customs from Jan. 13 to 19, targeted non-compliance with cross-border cash reporting rules and other illicit activities, The Straits Times reported.

More than 10,000 travelers and 260 vehicles were selected for inspection, while over 14,000 pieces of luggage and hand-carry bags were scanned or searched at land, air and sea checkpoints across Singapore, Channel News Asia reported.

Authorities uncovered S$3,398 (US$2,677) in evaded duties and goods and services tax involving items such as cigarettes, tobacco products, liquor exceeding duty-free limits and goods above Goods and Services Tax (GST) import relief thresholds.

Officials cited cases including a traveler carrying six undeclared sets of roller blinds, another with assorted luxury items, and a third with undeclared smartwatches.

All offenses were settled through compounding.

ICA also identified two travelers who moved cash exceeding the permitted threshold without proper reporting or with inaccurate declarations, Mothership reported.

In one case, a 46-year-old foreign woman was found on Jan. 13 to be carrying foreign currency equivalent to S$24,965 into Singapore without declaration and was issued a warning.

In another, a 49-year-old foreign man was stopped on Jan 14 while attempting to take out cash cheques worth S$91,789 without declaration. He was issued a S$9,000 composition sum.

Under Singapore law, travelers must declare cash or bearer negotiable instruments exceeding S$20,000 or its equivalent in foreign currency. Failure to do so may result in fines of up to S$50,000, imprisonment of up to three years, or both.

Authorities reminded travelers that they are legally responsible for making accurate and complete declarations of dutiable and GST-payable items. Those who fraudulently evade customs or excise duties may face fines of up to 20 times the amount evaded, jail terms of up to two years, or both.