Overview

Amazon treats every sellable configuration—whether a single item, a multi‑pack, a set, or a bundle—as a separate catalog entry. Using the wrong identifier for any of these configurations can trigger listing errors, suppressions, or policy violations, directly impacting a seller’s visibility and revenue.

Key Points

• Unique ID per sellable unit — A three‑pack of the same glove must carry a different GTIN than the individual glove, because Amazon catalogs them as distinct products.
• Separate GTINs for packs and sets — When you offer a set that contains multiple identical items (e.g., a 5‑count pack of socks), each pack size requires its own UPC or EAN.
• Bundles follow stricter rules — Bundles that combine different SKUs must meet Amazon’s bundle policy, undergo review, and can be removed if they violate any guideline.
• GTIN‑14 for case‑level sales — If you sell an entire manufacturer case as a single unit, the case’s GTIN‑14, not the individual item UPC, should be entered as the product identifier.
• Barcode must match listing data — The barcode printed on the packaging must correspond exactly to the GTIN you submit; mismatches cause catalog merges or suppression.

How Product IDs Work for Packs, Sets, and Bundles

1. Identify the sellable configuration — Determine whether the offering is a single item, a multi‑pack of identical items, a mixed‑item set, or a bundle. Example: a 4‑pack of reusable water bottles is a multi‑pack, while a “Camping Starter Kit” containing a tent, lantern, and stove is a bundle.
2. Locate the correct GTIN — For single items and multi‑packs, use the manufacturer‑provided UPC/EAN that corresponds to the exact quantity. For case packs, retrieve the GTIN‑14 from the case label. Example: the 4‑pack’s UPC may end in “‑04” indicating four units, while the case of 24 packs uses a GTIN‑14 such as “01234567890123.”
3. Enter the GTIN in the listing — Populate the “Product ID” field with the identified GTIN, selecting the appropriate ID type (UPC, EAN, or GTIN‑14).