You can always choose to waive dues for some of your members for whatever reason. To complete this step, make sure you follow the guidelines listed in the article Waiving and recording member dues.
However, it may sometimes happen that members that were exempted from paying dues are still required to pay for them. This is due to a glitch we're aware of and we're working hard to solve!
As a workaround in the meantime, we suggest to manually re-enable dues for these members and then exempt them again. This procedures allows for the system to reset and record the exemption correctly.