When a person comes in to buy a voucher for an already registered client, we always pop it under the clients name so if its lost, its not gone forever. However, sometimes the purchaser would like an emailed reciept. This is when it becomes an issue, because currently if you change the email on the reciept screen to send to the purchaser, it then saves that email under the client card as the clients email. It would be great if it wouldn't save and update their client card. It should just be a one-off email. Hope that makes sense!