Orders placed after cut-off time
In rare occasions, customers might be able to place an order after cut off times.
This is usually caused by one of the following reasons.
Abandoned cart
The customer has selected a date, started the checkout process but did not complete it and left your page.
They will then receive an 'abandoned cart' email with a link directing them to the checkout, with the date they selected still saved.
If Checkout Validation is active, they can't complete the order once that date is no longer available: they're asked to go back and choose another one.
For a smoother experience, you can also change the link in the 'abandoned cart' email to direct to the cart page instead of the checkout, so your customers select a new date before reaching the checkout.
Returning later to finish checkout
Your customer might have started the checkout process and kept the browser's tab open for a while before returning and making the payment, after the cut-off time has passed.
To prevent this, activate Checkout Validation. It checks the selected date and time slot again when the customer pays, against your cut-off and preparation times to the minute. If the date is no longer available, the customer is asked to go back and choose another one.