There are four types of anniversary codes that I'm aware of. These codes will NOT work unless activated by Birchbox on your account. As you near your three months, six months and nine months anniversaries you will get a promo code to use for 20% off a purchase of $25 or more. If you have neared (usually within a week of your anniversary date) or it's your anniversary date and you have NOT received a code yet check your email's spam filter, my own upgrade code was in my spam box. If you still don't see it in your inbox try using your email program's search feature (varies on what platform you use) and type in one of these promo codes to see if it can find the email. If that still fails contact Birchbox directly.
Three months anniversary code:
Use code '3months20' – available for 1 week only*
Six months anniversary code:
Use code '6months20' – available for 1 week only*
Nine months anniversary code:
Use code '9months20' – available for 1 week only*
Upgrade account from monthly to yearly for extra points.
To check for your anniversary date log into Birchbox, select Purchase History in the drop down menu at your name then scroll down. Your monthly subscription purchase will have the date of when you purchases your subscription and should say something like Order # 100####### Date 5/24/2011 Order Total $10 Order Status Processing View Order. My own anniversary date is on the 24th of each month with my yearly being on May 24.