Your tax invoice is your proof of purchase. You will receive a tax invoice in your email order confirmation and a printed copy with your order delivery.
If you have purchased your product in-store at one of our retailers, you would have received a printed or online receipt. If you do not have a receipt or order confirmation, then a bank statement would suffice as proof of purchase.
We always recommend our customers to hold onto their proof of purchase. You can take a photo of a printed copy or save your online copy and file this on your phone, computer, hard drive or in the cloud.