How do I register my kit? April 27, 2022 16:41 Updated After you receive your kit, you can register it here. You will be prompted to enter the unique barcode associated with your kit. Related articles Where do I find the barcode? How soon can I expect to receive my kit? How do I contact Labcorp OnDemand®? What should I do if I sent my kit to the lab before registering it? How long is my stool sample stable after it is collected?