I am an auditor of the hotel's finance department, which can also be said to be a daily audit, specializing in reviewing the original documents of the front desk, catering and other departments. The following is a detailed explanation.

since it is not a binding voucher, it is not an original voucher in the strict sense, so it does not need to be kept according to the accounting standards. The specific storage time should be according to the company's regulations or needs, but it depends on whether the important customer information is backed up, whether there is unsettled information, etc. As for general documents, I personally think 2-3 years is enough.