1. Staff negligence: Sometimes due to busy work or negligence, the staff will forget to ask you to sign. This kind of situation is not uncommon, and it can usually be solved by reminding or asking the staff to reissue it.

2. Authority: In some cases, only some staff members have the right to sign the nursing patrol list. You can't sign the document without proper authorization.

3. Change of system or process: Medical institutions will change the system or process from time to time, including the signing process of nursing checklist. If you don't understand these changes, you will feel confused or dissatisfied.