I've been informed that I can delete my Kakao Account after deleting linked service accounts or changing the settings. Under what circumstances am I not allowed to delete my Kakao Account?

Your Kakao Account cannot be deleted immediately if the deletion is likely to result in financial issues or impact to other people's use of Kakao services.

To delete your Kakao Account, please check first why your account cannot be deleted. Then, you can delete your Kakao Account after deleting linked service accounts or changing the settings.
Please understand that your Kakao Account cannot be deleted until delivery is completed or the refund period is over in case you have goods on order or in transit.