If someone comes to pay with a gift voucher that isn't found on the system (probably because it was sold on a previous software or prior to you starting with Phorest), you can add it manually at the payment type stage. 

Step-by-step guide

1. In the Purchase screen when you reach the payment type pop up screen you select Voucher (or Gift Card) and type in the Voucher (Gift Card) number
   
   
2. The Gift Voucher won't be found. Now tap the Add button
   
   
   
3. A new window will now pop up for you to confirm that you would like to add the new voucher to the system.  click Next
   
4. The system will then prompt you to enter the voucher value.  Enter the correct amount, and click OK
   
   
5.  The original voucher screen will now be shown again, just click next to confirm the voucher number, and then click OK to confirm the voucher value.  Note: at this stage you can change the voucher value, so for example if you have entered that the voucher is worth £100, but you only want to use £50 of it, you can enter £50 here, so the remaining £50 can be left on the voucher.  
   
   

You may want to keep an eye on all the Gift Vouchers manually added this way as there is no cash collected for them.