Hi ​@Spx4 

The notification is sent automatically when the phone is connecting to a roaming network, to inform your about the applicable rates in case of use, however, if there is not usage made, no charge should apply. If you see a charge on the next bill, please start a new post once the bill is issued and we will look into it further

For more info about how to prevent accidental roaming charges, please check out this article https://community.koodomobile.com/plans-services-232910/easy-roam-understanding-how-you-will-be-charged-while-traveling-7811296

Also, feel free to check the available  plans in your self serve account, as you might be eligible for a Canada-US plan: https://www.koodomobile.com/en/help/changing-your-rate-plan

With a Canada-US plan, there will be no fees for when the phone picks a US tower while near the border,. On top of that, you can use your phone without additional charges in US (some exceptions apply). More about Canada-US plans, you can find here https://www.koodomobile.com/en/help/traveling-with-your-canada-us-rate-plan