All articles ← Knowledge Base A/B testing with Celery Abandoned Cart Recovery Add AdRoll tracking conversion pixel Add custom tracking script to the order confirmation page Add Facebook tracking conversion pixel Add Google Adwords tracking pixel Add Quantcast tracking conversion pixel Add Twitter tracking conversion pixel Allow buyers to change shipping address Allowing customers to name their price API Documentation Auto-add a product to the cart and skip the first step in checkout Auto-Selecting a Product Variant Auto-trigger the Celery overlay Automatically detect a buyer's country (for multiple currency support) Bulk Actions Overview Bulk Fulfill via CSV Upload Can I customize my Celery checkout? Celery Feature Tour Changing the funding source for PayPal pre-approved payments Charge orders immediately at checkout (auto-charging) Creating a Terms and Conditions Policy Does Celery authorize credit cards? Does Celery work globally or accept international payments? Exporting Orders CSV Fraud and Chargebacks Fulfill with Bandwear Fulfill with DCL Logistics Fulfill with eFulfillment Service Fulfill with Fulfillrite Fulfill with Rush Order Fulfill with ShipStation Fulfill with Shipwire Host order lookup page on my own domain How can I change the size of my product image? How do I accept payments or receive funds? How do I accept PayPal? How do I add a coupon to an order? How do I add a message to buyers before checkout? How do I add an option or variants to a product? How do I automatically charge orders when they are placed? How do I change a line item (or variant) in an order? How do I change the currency? How do I change the order total? (Price Adjustments) How do I customize emails? How do I customize the buy button (color and text)? How do I edit an order? How do I format or style text (CSS/HTML)? How do I fulfill and ship orders? How do I install Celery on my website? How do I limit number of products sold? How do I publish or unpublish my product? How do I refund PayPal orders from Celery? How do I sell multiple products together using a collection? How do I sell services or digital goods (e.g., ebook, music, downloadable files)? How do I set up a product? How do I set up a webhook? How do I set up coupons? How do I set up referrals with Referral Candy? How do I set up shipping? How do I setup Google Analytics? How do I setup Stripe? How do I setup taxes? How long does do refunds take to reach my customer? How much does Celery cost? How should I track sales? How to create test orders HTTPS, SSL, encryption security concerns Indiegogo InDemand Installing Celery with Cratejoy Installing Celery with Shopify Installing Celery with Squarespace Installing Celery with Strikingly Installing Celery with Wordpress International Shipping and Taxes My customer's payment failed, but they are seeing multiple charges One-Page Checkout Order Filters Overview Order Lookup Portal Partial Refunds Pre-fill coupons or buyer information into the checkout form? Quick Start Guide Recommended Integration Resources Recommended Website Builders Refunds Overview Reports on products sold, orders placed, and money raised Resend order confirmation email Risk Analysis SSL, HTTPS, Security, or "why don't I see a green lock?" Use your own custom confirmation page Use Zapier to integrate Celery with MailChimp, Quickbooks and more (beta) Ways to promote your product with Celery What are locked orders? What happens when a charge fails? What is a PayPal preapproved payments plan? What is the maximum number of option groups or variants? When will I receive funds? Why am I getting a charge decline? Why am I missing conversion data in Google Analytics? Why do my customers see a $1 charge Why does Celery redirect on mobile? Why should I charge later?