Import failed or customer not found

If import fails, the app shows an error instead of retrying endlessly. Use the message to decide what to fix.

Customer ID from another shop

Customer IDs are unique per store. A CSV from another shop will not match by ID here. The app then matches by email, or creates a new customer when needed.

Missing email and phone

To create a customer that doesn’t exist in this store, the row needs at least an Email or Phone.

Shopify validation errors

Examples: invalid phone format, incomplete address rules, or marketing consent that Shopify rejects. Fix the value in the CSV or edit the customer after a partial import.

Empty file / no data rows

Make sure the CSV has a header row and at least one data row.

Tips

• Start with a small CSV (one or two rows) to verify matching.

• Prefer Shopify’s customer export headers, or download the sample CSV from the import dialog.

• Empty cells do not clear fields on update.