Custom notification when geo location enabled on checkout page

Hello, did anyone here experienced customers not checking theire City and Provence or State while they are on the checkout page?

We have, many unfortunately Dutch (our native countrymen/women) do not check if at delivery they filled in the correct City and Provence, this happens when we have the geo location addon/functionality in our store enabled.

I would like to show a notification to the customer to have him/her check if they postal/zipcode, city and provence or state is filled in correctly.

Is there a addon or quick mod I can use for that purpose?