In urgent cases concerning customs offences, you can call Customs’ free-of-charge tip-off number, 0800 1 4600 (24 h).
You can use the Customs online tip-off form for non-urgent reports of suspicious or illegal activity, such as the smuggling of narcotics or other goods, and misuses of fuel.
You can send tip-offs about suspected car tax evasion to the Tax Administration on verovilppi@vero.fi