The aim of orthodontic retention is to counteract post-treatment changes and thereby to preserve the result of active treatment. For active orthodontic treatment, a certain level of patient compliance is necessary and the same applies for the retention phase. Ideally, the retainer will never fail or get lost, the patient will adhere to all recommendations and will wear the retainer in accordance with the instructions, necessary precautions with the fixed retainer are followed, the patient reports a problem immediately, and appointments for retention check-ups will always be met. Unfortunately, the reality is often different. This article considers the need to provide the patient with information about retention before treatment and the problems that may arise during the retention phase. Recommendations are made on how to avoid these problems as much as possible, and solutions are offered for problems that do arise. Finally, it is made clear how the orthodontist, patient and dentist can be jointly responsible for the retention phase.