We use postcode.nl API to get the correct address based on postal code and housenumber. Daily we plan trips for around 100 addresses and in 7% of the addresses we get other address back from RouteXL. I mailed RouteXL 3 weeks ago but no response. Hope you all can help me.
Locating partial addresses on the map can be a hassle. There are some tips to improve geocoding in our Wiki:
https://wiki.routexl.com/index.php/Geocoding
If you have geocoded addresses with another API, you may consider entering the lat,lng coordinates directly instead of the address.