GS1 Company Prefix/GS1 US GTIN/Global Location Number Cancellation/Exchange Policy: Once a payment is made to GS1 US, Inc., you may not exchange the licensed GS1 Company Prefix/GS1 US GTIN/Global Location Number. Payments are non-refundable, so please understand your numbering requirements before finalizing your application and making payment. For GS1 Company Prefix or GS1 US GTIN, click on the Barcode Estimator to understand the barcode/Global Trade Item Number requirements.  By submitting the order, you understand the above cancellation/exchange policy.