If you use Toast and have configured Receipt Messages in the Punchh Platform in Settings > Receipt Messages, you will be unable to see them in printed receipts as these messages are not supported with Toast.
As a workaround, you can make configurations within Toast. Most receipt customizations are done in the Toast Backend under Marketing > Receipt Setup where you can configure the Header and footer of the receipts:
More details on the Toast page at https://central.toasttab.com/s/topic/0TOC0000000DrLvOAK/receipt-setup