Whenever an item is bought from your Online Store, the Donor Tag is attached to the user.

If you would like to make parents Members in the system prior to them buying somethings in your Store, you will either want to invite them or bring them in through a Registration Page you create for your website. If they are already in your system as a Donor, you may edit their contact by toggling ON the Contact is a Member option and Save. The system will then automatically invite the user to be a Member.