For help on assigning members click here
To prompt your assigned members:
Go to the Payments section of your Club Control Panel.
Click on the Product you wish to prompt members for.
Click on the Members not paying option.
Select the member/s by ticking the selection box on the left hand side of each member and then click the Send payment request request by email above the members.
You can only prompt a member once in any 7 day period.