You can easily skip orders on your Green Chef account. Simply visit Your Plan, and click on the week you would like to skip. You'll then select Edit Order, and Skip Order from the drop-down selections. A pop-up will appear for you to confirm. Select Skip Order.
If your plans change, you can always un-skip before your weekly deadline, 7 days prior to delivery at 11:59 pm ET.
You will not be charged for any week(s) you choose to skip.