New Hunting rules for 2020-2021 includes requirement that permission to hunt another’s land needs to be in writing annually. This is part of the Landowner Protection Act. The NCwildlife site says:

Sportsmen now need written permission, dated within the past 12 months, signed by the landowner or lessee, to hunt, fish, or trap on private lands posted with signs or purple paint.

For more on this go to and click on bottom right corner for full text: Season limits & Landowner Protection Act