Once your event has concluded, the steps you should take to shutter your site are illustrated below.
If you will have new Auction Chair(s) for your next event, Create a User Account for them so they will be able to create the new event site and get started. Then be sure to send them that list you kept: "Things I wish someone had told me"!
1. Place a Thank You Note on the Homepage
Go to Admin > Site Settings > Customize Your Site > Homepage
2. Turn off External Purchasing Links:
Go to: Admin > Site Settings
3. Discourage Search engines from crawling old items and donors
Go to: Admin > Site Settings > Customize Your Site > General
4. Purge Vaulted Guest Credit Card Data
Go to: Admin > Site Settings > Payment / Credit Card > Credit Card General (requires User account with Chair role)
5. Contact your Gateway and Merchant Account provider to discuss suspending your accounts.
If you are certain you will not use a credit card account again until next year, it may make sense for you to suspend/inactivate/turn off your gateway and merchant account. Before deciding, be aware:
A. That BOTH the gateway and the merchant account must be suspended to avoid monthly fees.
B. Of any fees associated with suspending and reactivating BOTH accounts.
Also - be sure to document and share all of the information that will be needed to reactivate the accounts to avoid future headaches for yourself or your successor.