Merchant Center Says “Checkout Incomplete” — But Your Checkout Works? You open your store. Pick a product. Click: Add to cart Go to checkout. Everything looks normal. But Merchant Center says: Checkout incomplete or warns that: Users cannot complete purchase That can be confusing because your store may genuinely be receiving orders. But I would not use: “Someone bought something yesterday.” as proof that every checkout path Google can test is working correctly. I would test the entire purchase flow from the exact products submitted to Merchant Center. Because sometimes the problem appears only for: one product one customer type one billing location one payment method mobile users guest users or one strange required checkout field Start With an Affected Product Don't begin on the homepage. Open one product Merchant Center is actually using as an example. Then follow the real customer path: Product page ↓ Add to cart ↓ Cart ↓ Checkout ↓ Address ↓ Payment ↓ Order confirmation If you...