The same rules apply for moving abroad as for moving within the Netherlands.
If you have an open-ended contract, such as a variable or dynamic energy contract, you can always cancel your energy contract free of charge. You can usually manage your move easily through your energy supplier’s online portal or app. Make sure to notify them in time and keep in mind the supplier’s notice period.
If you have a fixed contract with an end date, you may have to pay a cancellation fee if you end the contract early. You can always request the exact amount of the fee from your supplier. Manage your move online and be sure to notify your supplier on time.