You have three stores and two online carts, and one unit left of your best seller. Which store’s shelf does the website think it is selling from? If you can’t answer that, you already have the problem this post is about. Most multi-location inventory sync advice stops at speed: make the counts update faster. Speed matters, and our guide to real-time inventory sync and overselling covers it, but it answers the wrong first question. Before any cart can show a number, someone has to decide which stores’ stock it is allowed to sell. The short answer: only stock from stores that