@alejandro-do-nascimento

Under Settings=>User there is an option Forum terms of use.

0_1525710308026_2018-05-07 12_24_15-Settings _ User _ NodeBB Admin Control Panel.png

When it is filled out, users will need to check a box when they register.

0_1525710359056_2018-05-07 12_20_47-Registration complete _ The MGS.png