Klaviyo's back in stock trigger reads one inventory total across all Shopify locations. How far the threshold workaround goes, and when a per-location app fits better.
A single returned unit can email your entire waitlist. How minimum quantity thresholds and level-triggered stock checks stop false restock alerts on Shopify.
Shopify's restock webhook only fires when total inventory crosses zero, so alerts can blast phantom notifications or stay silent after a real restock. Here is the difference between edge-triggered webhooks and level-triggered polling, and how to diagnose a waitlist that never hears back.
Since July 2026, negative stock at a non-shippable Shopify location counts against online availability. Shoppers can add to cart, then hit a checkout error. Here is the inventory math and how to fix it.
A Shopify Community thread asking for restock alerts that watch a single warehouse has been open since 2021 with no working answer. This guide explains why most apps cannot do it, what a correct per-location trigger has to get right, and how to set it up with campaigns in Dash Checkout.