{firstname_friend} {lastname_friend}, join us!
  Your friend {firstname} {lastname} wants to refer you on {shop_name}!

We are pleased to offer you a voucher worth {discount} that you can use on your next order. Get referred and earn a discount voucher of {discount}! It's very easy to sign up. Just click here!
 
When signing up, don't forget to provide the e-mail address of your referring friend: {email}.

Best regards,