Is it appropriate to remind the boss not to forget something?

It depends on the specific situation and occasion.

1. If this matter has an important impact on the company's business or team work, or if this matter was entrusted to you by the boss himself before, you may need to remind the boss to avoid major mistakes or omissions.

If this matter is unimportant, not urgent, or belongs to the boss's private affairs, then reminding the boss may be regarded as ultra vires or interfering in the boss's private affairs. In addition, even if it is necessary to remind, we should pay attention to the way and timing to avoid embarrassing or unhappy the boss.