Contact and Consent Rules
From Charitylog Manual
Location in standard build: Bottom of Client Details Screen
The Contact and Consent rules area, on an Organisation/Person's Details screen, lets you store information about how and if someone should be contacted.
The standard "consent given" field
There is a standard field named "Consent Given?" available on each organisation/person's Details screen. These can be turned on if necessary using Customisable Tab Settings.