Final answer:
Provide guests with the estimated pick-up time, total cost, payment confirmation, detailed itemized receipt, and clear pick-up instructions when processing their to go order.
Step-by-step explanation:
When processing a to go order for a guest, it is important to provide them with all the necessary information they need for a smooth pick-up experience. This includes the estimated time for order completion, the total cost including any taxes or fees, and payment confirmation if prepayment was involved. Additionally, you should inform the guest of any pick-up instructions such as where to park, which entrance to use, or how to identify themselves upon arrival. It's also crucial to give them a detailed receipt which includes an itemized list of their order to review and ensure accuracy.