Give the gift of fresh, handmade sourdough You can purchase a Serenity Sourdough Bakery gift certificate for any amount. Simply write in the amount you’d like in the specifications box, and I’ll email you an invoice along with your unique certificate number. Each certificate comes with its own envelope, ready for gifting. How to Redeem Your Certificate: Place your order, under your contact information in the additional notes section write that you have a certificate. Then enter your certificate number at checkout when purchasing your baked goods.