From September 2015 to January 2016, complaints were filed about possible tampering of the number of pulse signals received by taxi meters 
due to structural defects of those meters. A review meeting held by the Bureau of Standards, Metrology & Inspection (BSMI) found that those meters did not violate "Technical Specification for Type Approval of Taxi Meters" regulations. Nevertheless, to eliminate consumer concerns, manufacturers of those meters have agreed to enhance anti-tampering functions. On May 13, another review meeting was held regarding complaints about 
The meeting also found that the two taxi meters did not violate aforementioned technical specifications, but their manufacturers, as responsible corporations following the bureau's guidance, have agreed to enhance meter structures to protect consumer rights. The bureau will supervise them to make sure that improvements are carried out. The BSMI has been conducting roadside inspections on taxi meters. From April 6 to May 18, a total of 1,005 meters were checked and all were in conformity with the standard requirements. Results show that taxi drivers are law abiding citizens and that tampering complaints cannot be proven. To make sure that taxi meters function correctly and that consumer rights are protected, the bureau will continue to administer roadside inspections. Taxi meter is one of legal measurement instruments that must pass type approval and verification before installation. An approved meter should be affixed with a compliance tag. New type meters can print out receipts, which must be provided to consumers under traffic regulations. Any consumer that doubts about fare can file a complaint with a local traffic authority or the BSMI by submitting that receipt. The authority will check the information on the receipt (such as distance and time) and inspect the taxi in question. Should violations be found, the meter will be suspended from use until it is retested and approved. Malevolent tampering of meter is an offense of falsifying weights and measures. Tampering incidents will be handed over to prosecution and investigation agencies for further probe. The BSMI reminds that consumers should look for compliance tag bearing a verification mark 
on the meter when taking a taxi to make sure that it has not expired and remember to ask for a receipt (with complaint hotline on it). When you are in doubt about fare, you can call the BSMI (02-28348456), local traffic authorities and the citizen hotline for filing your complaint to protect your consumer rights.