How to do remark sales record and receipt?

How to put a serial number of my product on receipt and my pos record so that I can track my product warranty.

You can add the comment to the item during a sale. After you put the item to the ticket, you can open it to edit and fill in 'Comments' field. 

Then you will see this information at the back office in the 'Receipt' section. Just open the receipt. 

 

This comment will not appear on the printed receipt. 

Anytime you can check the information about the warranty at the back office. You can find the needed receipt by the number. 

On 1/10/2018 at 12:56 PM, Andy said:

You can add the comment to the item during a sale. After you put the item to the ticket, you can open it to edit and fill in 'Comments' field. 

Then you will see this information at the back office in the 'Receipt' section. Just open the receipt. 

 

This comment will not appear on the printed receipt. 

Anytime you can check the information about the warranty at the back office. You can find the needed receipt by the number. 

Actually, I found that these comments do get printed but you need to have "Show comments" enabled in the Back Office.