The front desk didn't confirm after the hotel checked in.

The solution to this situation is to contact the hotel actively, keep the voucher and ask for help.

1. Take the initiative to contact the hotel: contact the hotel front desk as soon as possible after check-in, confirm the check-in information and understand the reasons for not confirming, so as to ensure that the information of both parties is synchronized. 2. Keep the voucher: keep the check-in voucher, such as invoice and deposit slip, so that it can be used as evidence in case of communication problems. 3. Ask for help: If the communication fails, contact the hotel manager or consumer protection agency for help and safeguard their own rights and interests.