Allow Receipt custom message or Up character limit

Had a merchant on old receipt display there refund policy for example:

We want you to be completely satisfied with your purchase! 

If you change your mind or are not satisfied, we offer exchanges or store credit only (no refunds) within 14 calendar days of purchase. Please note, items must be unworn and unwashed, with all tags attached, in order to exchange an item or receive store credit. All clearance items are final sale (no refunds, exchanges, or store credit).

Thank you,

Currently there is a character limit and doesn't allow the full length of a custom message to be entered on the receipt.