When the board or officers of a group change, the website needs to change hands with them. This article says what to do so the new people can look after it and the old ones no longer can.
Add the new people and remove the old
On the Users screen, add each new person and take off each person who has left. Add the new people first, so the website always has someone with each role. The People on Your Account explains the Billing, Contact and Admin roles, why each new person confirms their email address, and which role receives your renewal notices and the messages from your Contact page.
Give Billing to whoever now looks after payments, and Contact to whoever should receive visitors' messages.
Check who holds the domain name
A group's domain name belongs to the group, not to one person. Make sure the new officers know it is the group's, and who at the group we should deal with. Your Domain Name explains who owns it and how it is managed.
Tell us
Email us from the address of a person who is on the account, and tell us who the new officers are. We ask that support requests come from the person who set up the account or a person who is on it, so telling us early means we know to help the new people.
Contact us if you are unsure about any step.