There is no way to mass delete members. Deleting members is not recommended as ALL information is removed from your system when you do that (transactions, member info etc). Instead, we recommend that you edit each member record and set their status to "Inactive"
Edit Member Details
The Member Details page can be found under Members Edit Member Details
Decide which criteria to use to select a member and click the button. All of the members that match the criteria will be listed.
Click the 'edit' link next to the member to bring up their profile
Under the 'Account Details' section, choose 'Inactive' from the 'Status' drop down menu.
Save the Changes
When all of the changes have been made, click on the found at the bottom of the page.