The hotel didn't check in and forgot to cancel.

According to the query of Baidu Law Pro, if the hotel fails to check in and forgets to cancel, the following measures can be taken:

1. Contact the hotel front desk directly: you can call the hotel front desk to explain the situation and provide the corresponding order information, and ask to cancel the order.

2. Cancel through Ctrip app: If booking through online platforms such as Ctrip, you can try to log in to Ctrip APP, select "Hotel Check-in" on the main page of the software, find the order in "My Order", and try to click Cancel.

A hotel is a business organization that provides you with safety and comfort, and gives travelers or travelers a short rest time or sleeping space.