Letter Confirmation
By default, letters are sent unless you cancel them (with a minimum 2 hour delay for you to proof the letter). Optionally, you can have all letters held unless you explicitly approve them for mailing.
Step 1
To turn on (or off) required confirmation, go to the user preferences page by clicking the "Preferences" link from your home page.

Step 2
To change your confirmation preferences, just set the box to turn on or off required confirmation.
