Display the licence
It is also your insurance cover.
The authorisation and the driver pass. If they are not there, neither is your insurance.
Remunerated passenger transport in Flanders requires a municipal authorisation and a driver pass under the 2020 decree, and both must be displayed in the vehicle. That is not administrative decoration: a car carrying paying passengers without them is operating outside the rules, and its insurance will not respond for a passenger in an accident.
The second thing worth insisting on is the fare. A price agreed before the journey, with no undisclosed supplement, removes the only genuinely unpleasant part of taking a taxi — the uncertainty about what the number at the end will be. It also means the driver has no reason to take the longer route.
And for a flight, honesty about time beats optimism. Traffic and roadworks are unpredictable, so the right approach is to plan backwards from check-in with a margin rather than shave the pick-up to the minute. Nobody remembers the twenty minutes saved; everybody remembers the flight missed.
It is also your insurance cover.
No supplement that was not disclosed.
Traffic is not a schedule.
Tell us the journey and we will quote it before you commit.