Help Center
Help center
Answers about barcodes, orders and marketplaces
Guides written by the people who answer our support email. Browse by topic below, or search on the contact page for instant answers to the most common questions.
Getting started
- Guide to UPC barcodes
- How much are UPC codes?
- Can you print labels for my barcodes?
- Do I need a separate UPC for every product?
- How do I look up a UPC code?
- Will my UPC codes ever expire?
- Do I need to buy a UPC barcode?
- Do I need to register my UPC codes?
- How to buy UPC codes to sell on Walmart
- How to avoid barcode renewal fees
- ISBN vs copyright vs barcode
UPC basics
- How many digits are in a UPC code?
- How do I buy a barcode?
- What is the GS1?
- Where can I use the codes I buy from you?
- My codes aren't formatted correctly, what do I do?
- A different company shows up when I search my code, why?
- Selling a book: UPC, EAN or ISBN?
- Why isn't my company name shown when scanned?
- Do I need a UPC code to sell online?
- What is a UPC letter of affiliation?
Selling on Amazon
Your order and account
Amazon listing errors
- The SKU does not match any ASIN...
- This ASIN has GTIN codes that do not match the brand...
- You are using UPCs, EANs, ISBNs, ASINs or JAN codes...
- The SKU data provided is different from the catalog...
- This SKU has an inconsistent product classification...
- Common Amazon errors
- How to fix Amazon error 8572 (GTIN mismatch)
Guides by product type
- GTIN vs UPC: what they are and how to use them
- ITF-14 carton barcodes
- SKUs vs UPCs
- Barcodes for alcohol and liquor
- Barcodes for music
- Barcodes for books: what is an ISBN?
- UPN for medical products
- What is a master carton (SCC-14) code?
- Top 12 myths about UPC barcodes
- Barcode generator and retail barcodes
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