A product can show real stock in Shopify, look completely normal on your storefront, and still be impossible for a customer to actually buy, because the location holding that stock isn't attached to any shipping setup at all. This is a quiet, structural problem: nothing in Shopify itself warns you about it, and it can sit unnoticed for a long time, because the product page looks fine. Arbyn watches your catalog for exactly this shape and emails you before it costs you real sales.
What it does
Once a day, Arbyn checks whether any of your active stock sits at a location that Shopify can't actually fulfil from, meaning that location isn't part of any delivery profile, so there's no shipping rate, pickup option, or delivery method attached to it. If enough of your products are affected, you get an email naming the exact count and the exact location, so you know precisely what to go fix rather than guessing.
This is the same check that powers the sellability numbers on your Knowledge → Catalog audit page. The email can never disagree with what that page shows, because both read from the same underlying check.
Where to find it
You don't need to open anything for this to work, it runs automatically in the background. If it finds a real problem, you'll get an email with the subject line "[Action Required] N products on your store cannot currently be sold." To see the affected products yourself at any time, go to Knowledge → Catalog.
How it works
This is specifically about location coverage, not being out of stock. A product that's genuinely sold out is a completely different, normal situation Arbyn already handles by telling a shopper honestly. This alert is about the opposite problem: Shopify's own inventory count says you have stock, but that stock is sitting somewhere with no shipping setup behind it, so it can never reach a customer's cart no matter how many units you have.
Why this happens most often with fulfilment apps. Apps like Trendsi, Printful, and Printify frequently create their own Shopify location automatically to hold the inventory they manage on your behalf. That new location doesn't automatically get added to one of your delivery profiles, so it can end up fully stocked and completely unsellable at the same time, without you ever choosing that outcome.
A small number of affected products doesn't trigger anything. Arbyn only sends this alert once at least a handful of products are affected, specifically 3 or more confirmed unbuyable items. A store with one or two genuinely edge-case products isn't treated as a crisis, that's normal retail noise. This alert exists for the case where a meaningful slice of your catalog has quietly gone dark.
You won't be emailed about the same problem every single day. Once you've been alerted, Arbyn waits at least 14 days before sending the same alert again, so it doesn't become background noise you learn to ignore. The moment the underlying problem is fixed, checking the audit page will show it resolved immediately, you don't need to wait for another email to confirm it.
The email names the exact cause, not a vague warning. It tells you how many products are affected and which location is holding them, so the fix is specific: add that location to a delivery profile with at least one shipping rate, enable local pickup for it, or move the affected inventory to a location that's already properly covered.
Good to know
This never fires on ordinary out-of-stock products. It's specifically about stock that exists but sits somewhere unreachable, not about inventory count.
The email and the Catalog audit page always agree, because they run the same underlying check. If the email says something is wrong, the audit page will show you exactly which products.
This is a genuinely structural problem, not a Shopify glitch. It's almost always a location a fulfilment app created automatically and that never got added to a delivery profile.
Fixing it in Shopify is what resolves it. There's nothing to configure inside Arbyn, the fix happens in Shopify under Settings, then Shipping and delivery.
FAQ
Why would Shopify let me have stock I can't sell? Shopify tracks inventory and shipping coverage as two separate systems. A location can genuinely hold real, correct stock counts while having no shipping profile attached to it at all, Shopify doesn't block that combination or warn you about it on its own.
How many products does this take before I get an email? At least 3 confirmed unbuyable products, store-wide. Fewer than that is treated as normal, occasional friction rather than something worth interrupting you about.
I fixed the location, why haven't I gotten a confirmation email? There isn't a separate "you're fixed" email, the alert only fires when there's a real problem. To confirm the fix worked, check Knowledge → Catalog, which reflects the current state immediately.
Will I get this email every day while the problem exists? No. Once you've received it, there's at least a 14-day gap before the same alert can fire again, so it doesn't become noise you start ignoring.
Does this affect what Arbyn tells a shopper about the product in the meantime? Yes, indirectly. Since the product genuinely can't be fulfilled from that location, Arbyn's own answers about availability reflect that reality rather than promising stock that can't actually ship.