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# What barcode labels should I use for my product?

## Here's a break down of FNSKU vs GS1 Barcode (UPC/EAN)

### ✅ FNSKU vs GS1 Barcode (UPC/EAN)

| Type | Purpose | Used By |
| --- | --- | --- |
| FNSKU | Amazon’s unique identifier for your product, tying it to your seller account | Required if you use Amazon's fulfillment services (FBA) |
| GS1 Barcode (UPC/EAN) | Universal product identifier, typically for retail products | Used in retail stores & optional for Amazon |

---
### 🎯 Which One Should Be on Your Product for FBA?

* If you're doing **FBA (Fulfilled by Amazon)** and chose **“Amazon barcode”** during the listing setup, then:  
✅ **FNSKU labels are required**, and the GS1 barcode **should be covered or removed**.
* If you selected **“Manufacturer barcode”** during setup (using UPC/EAN), then:  
✅ You can use **your GS1 barcode**, and no FNSKU is needed.

---
### ⚠️ How to Know Which You Chose:

To double-check:

1. Go to **Seller Central**.
2. Navigate to **Inventory > Manage FBA Shipments**.
3. Open your shipment or product listing.
4. Check the **labeling option** selected — "Amazon barcode" = FNSKU; "Manufacturer barcode" = GS1/UPC.

---
### ✅ Best Practice:

If you're unsure, use **FNSKU labels** — they ensure that inventory is linked directly to **your seller account**, especially if other sellers list the same product.

Let me know if you want help identifying if your current label is an FNSKU label — or feel free to send an image for confirmation!