Creating a custom field
Firstly we will go to the settings cog in the top right and then to club info, then click on the members area tab, within here you are able to setup custom fields.
To fill in the custom field on a customer account
Go to the customer's profile via the members grid, then click on the profile tab, within here you are able to enter in the contents to the field which you created.
Once you have enter in the contents to the customer field you can then search the contents in the members grid and this will bring up the customer.