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Fix Amazon → Shopify Sync Issues (Not Working, Errors, Duplicates)

🔧 3 Common Issues

Diagnose and resolve common sync problems. We've documented the 3 most common issues, their root causes, and exactly how to fix them. See step-by-step fixes for duplicates, missing fields, rate limit errors, and connection issues.

critical High Frequency

Products not syncing to Amazon

Also searched as: "Amazon Shopify products not syncing to amazon"

#1 Invalid UPC/EAN or Product Identifiers 40% likely

📋 How to Diagnose

  1. 1. Check product identifiers in Shopify
  2. 2. Verify UPC/EAN codes are valid and match Amazon requirements
  3. 3. Review Amazon category-specific requirements

✓ Solution

Update product identifiers to meet Amazon's requirements. Use valid UPC/EAN codes and ensure product categories are correctly mapped.

⏱️ Est. time: 60 min

#2 Missing Tax Codes 30% likely

📋 How to Diagnose

  1. 1. Check tax settings in Shopify
  2. 2. Verify tax codes are correctly configured
  3. 3. Review Amazon's tax requirements for your region

✓ Solution

Configure tax codes in Shopify to match Amazon's requirements. Consult with a tax professional if needed.

⏱️ Est. time: 30 min

#3 Amazon Category Restrictions 30% likely

📋 How to Diagnose

  1. 1. Check if your product category is restricted on Amazon
  2. 2. Review Amazon's category approval requirements
  3. 3. Verify if you need to apply for category approval

✓ Solution

Apply for category approval if required. If category is restricted, consider selling in a different category or using Amazon's FBA program.

⏱️ Est. time: 120 min

Use Make → →
View Setup Guide
high High Frequency

Orders not importing from Amazon to Shopify

Also searched as: "Amazon Shopify orders not importing from amazon to shopify"

#1 Sales Channel Disabled 40% likely

📋 How to Diagnose

  1. 1. Check Shopify Amazon Sales Channel status
  2. 2. Verify if the sales channel is active and connected
  3. 3. Review any recent changes to sales channel settings

✓ Solution

Re-enable the Shopify Amazon Sales Channel if disabled. Reconnect the integration if necessary.

⏱️ Est. time: 15 min

#2 Payment Gateway Mismatch 30% likely

📋 How to Diagnose

  1. 1. Check payment gateway settings in Shopify
  2. 2. Verify if the payment gateway matches Amazon's requirements
  3. 3. Review order payment status on Amazon

✓ Solution

Update payment gateway settings in Shopify to match Amazon's requirements. Ensure payment methods are correctly configured.

⏱️ Est. time: 30 min

#3 Address Validation Errors 30% likely

📋 How to Diagnose

  1. 1. Check order shipping addresses on Amazon
  2. 2. Verify address formats are valid
  3. 3. Review any address validation errors in Shopify

✓ Solution

Fix invalid shipping addresses in Amazon. Use address validation tools to ensure correct formatting.

⏱️ Est. time: 20 min

Use Make → →
View Setup Guide
high Moderate Frequency

Inventory quantities out of sync

Also searched as: "Amazon Shopify inventory quantities out of sync"

#1 Over-selling or Inventory Mismatch 40% likely

📋 How to Diagnose

  1. 1. Check inventory levels in both platforms
  2. 2. Verify if there are any unfulfilled orders or returns
  3. 3. Review inventory settings and sync frequency

✓ Solution

Update inventory levels manually in both platforms. Implement inventory management processes to prevent over-selling.

⏱️ Est. time: 30 min

#2 Inventory Settings Mismatch 30% likely

📋 How to Diagnose

  1. 1. Check inventory settings in Shopify
  2. 2. Verify if inventory tracking is enabled
  3. 3. Review Amazon inventory settings

✓ Solution

Ensure inventory tracking is enabled in both platforms. Configure inventory settings to match across platforms.

⏱️ Est. time: 20 min

#3 API Throttling 30% likely

📋 How to Diagnose

  1. 1. Check integration logs for API errors
  2. 2. Verify if you're hitting Amazon MWS API rate limits
  3. 3. Review sync frequency settings

✓ Solution

Reduce sync frequency or implement rate limiting. Use Make.com to optimize inventory sync operations.

⏱️ Est. time: 45 min

Use Make → →
View Setup Guide

Step 1: Try the Official Integration

Direct connection

Start with the native integration if available. It's usually the most reliable, but may have limitations.

View Setup Guide

Free with your subscription

Step 2: Use Make for Custom Flows

No code automation

Create custom integration workflows with Make's visual designer. It works with almost any API.

Try Make Free →

1000 ops/mo free. No credit card.

Step 3: Self-Hosted with n8n

Full data control

Need complete data privacy? n8n is open-source and self-hostable. Build custom integrations with full control over your data.

Try n8n Free →

Open source. Self-host or cloud. Unlimited ops.

Step 4: Add Human Review

Approval automation

Relay adds human-in-the-loop approvals, Slack/Teams alerts, and conditional logic to your automation.

Try Relay Free →

1000 actions/mo free. No credit card.