Brother QL-570VM - Manual (Page 96)

Reception Mode
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3.
Click the [Overwrite] button.
4.
Click the [Yes] button.
The edited visitor information is saved and added to the "Reserved" list.
If an expected arrival date prior to the current date is specified, the arrival date
is set to the current date.
If an expected departure date prior to the expected arrival date is specified,
the departure date is set to the arrival date.