In particular, tax inspectors are to probe whether the taxis have up-to-date taximeters and whether they provide receipts.
By August 2018 the service has carried out a total of 110 checks on the spot, and a receipt was provided in only 15 cases.
The service said that in about 40 cases taxes were not calculated correctly.
Fines of a total €62,400 were slapped on taxis in these raids, while a total of 51 consultations were given over following the law.
Since the departures terminal at Rīga International Airport was made available to any taxi company and since a price ceiling for taxi services was lifted, there have been numerous complaints over unfair taxi prices and other practices.