In case your withdrawal confirmation letter did not arrive in your email box, or you have accidentally deleted it you can always request a new confirmation by clicking on the "Request Withdrawal Confirmation" button 
which can be easily located via Panel -> History -> Withdrawals.
If you still can't find the confirmation letter in your email box, spam or junk, please add domain @hashflare.io or our full email address alerts@hashflare.io to the whitelist. Then try searching for messages from that address and you should find them in your inbox (you need to check the Spam folder as well).