Why are customers experiencing shipping errors at checkout?

Payments + Shipping & Fulfilment

Topic summary

Customers report checkout errors like “Some delivery details may have changed” and “Shipping options have changed,” blocking purchases.

Scope and patterns:

  • Affects multiple apps and setups: Boxify, ShipStation, ShippingEasy, Recharge, and even some digital-only checkouts. Often worse on desktop; mobile sometimes unaffected. Seen with returning visitors/abandoned carts and when shipping and billing addresses differ.
  • Technical note: One user isolated a root trigger—mismatch in carrier Service’s service_code between the initial rate response and a later payment-stage request. Screenshots of the errors were shared.

Likely cause and status:

  • Several reports cite a buggy rollout of Shopify’s new checkout causing intermittent rate refreshes. Shopify support acknowledges a “known issue,” but merchants dispute notices about app “partnership terminations” and say they received no prior emails. Issue remains open.

Workarounds reported:

  • Ask Shopify to revert the store to the previous checkout or apply a manual account-level fix (some success).
  • Replace rate provider: Intuitive Shipping (pulling ShipStation rates) eliminated errors for some; ShipperHQ also avoided it (costly).
  • Temporary hacks: navigate back/forward in checkout; add a “call for shipping” fallback.

Latest update:

  • With Shopify Functions (delivery customization), simply hiding an option can trigger the error, blocking production use.
Summarized with AI on December 30. AI used: gpt-5.
23

Here is how I resolved this.

I moved from using shipstation to provide checkout pricing to shopify to using Intuitive shipping to provide the shipping rates from shipstation to shopify.

So I could not solve the problem – but I got around the problem. Intuitive shipping worked great because it allows me to have a lot of shipping rules and it still provides the customers with the discounted UPS by shipstation rates. And I can choose what shipping choices I want to show–shipstation by itself had its own algorithm of what shipping choices it thought it should show to the customer and hid some I wanted to show—Intuitive shipping allows me to show what I want.

Hope this helps. By the way I also find using shipperhq instead of shipstation avoided the error. But shipperhq was very expensive and would not pass the discounted UPS by shipstation rates to shopify.

So my assessment of the situation is that from your recent report of the error, it does not sound like shopify has fixed this problem. But some shipping programs don’t encounter it.