Did you purchased extended warranty? If so you can just go to any Future Shop and give them your phone number. They will be able to pull up your receipt quickly.
If not, but you used a debit or credit card, bring your statement with the purchase on it to the store you purchased it. They will be able to send an email to head office to find the invoice number. This typically takes 2 business days to get a response but you will have a copy of the receipt.
