Why is Gelato declining payments despite Shopify order confirmations?

Topic summary

Users are experiencing a payment processing discrepancy between Shopify and Gelato (a print-on-demand fulfillment service).

The Problem:

  • Shopify confirms orders as paid and sends order confirmations to customers
  • Gelato simultaneously declines these same orders, citing payment issues

Specific Error Messages:

  • “Payment declined by card issuer”
  • “Insufficient_balance” (despite confirmed funds available on card)

Current Status:
The issue remains unresolved with no explanation provided for why Gelato’s payment system contradicts Shopify’s successful payment processing. Multiple users are affected by this integration problem.

Summarized with AI on October 28. AI used: claude-sonnet-4-5-20250929.

Shopify says that orders are paid and have sent order confirmations but Gelato says that the orders have not been paid and are refused due to the “payment declined by card issuer” why?

somebody knows why?? I have the same issue right now, gelato decline the payment for “insufficient_balance”, but there is money on my card… help please