Looking to get a 20% off Amazon promo code? Save 20% off at Amazon.com with a wedding registry! You can qualify for a wedding gift promotion every two years. The 20% off promo code is valid for Amazon Prime members on items sold by Amazon.com, however non-Prime members can still receive 10% off! Your one-time use promo code is valid for 90 days from the event date. Keep in mind that you can only use this offer on one order!