Every time a new quote is created, a new customers entry is also created under the Customers profile (unless it's from an existing customer). If a customer submits multiple quotes, the software will detect that it is the same customer and will not create a new profile for that customer. But if the name, phone, or address changes, then it will create a new profile for that customer. This could be done by typo, but still pick up as a new customer.
When editing a lead, you can use the New Profile option when you do not want to update an existing customer record.
Searching for an Existing Customer
To search for a customer, use the Events drop down tab and select "Customers"
You may use a keyword in the keyword box on the left hand side to search for an existing customer. The customers can be filtered by blacklisted and non-blacklisted customers, inactive customers, and subscribed and unsubscribed customers. You can also search by name (first or last), organization, email address, phone number(s) and/or city.
Customers that have the same email address, are grouped together (if no email is specified then it groups them by organization). If you click on a customer you can see the other profiles that exist. Often times you'll get multiple profiles for the same customer because something with their address or phone number has changed.
Example of a customer with two profiles. They are grouped under the same name because the email address is the same.
Merging Customer Profiles
You can use the merge utility to merge duplicate profiles into one profile, by selecting the customers you'd like to merge.
Merge utility showing which fields are different. Once you select "Merge Utility", you will be brought to a screen that pulls up the difference in the customers profiles; spelling of name, phone number(s), address(es), emails, etc. You must then select what information is needed for the customer. Once complete, select the "Merge" button at the bottom of the screen:
You can blacklist customers to prevent them from booking an event, A lead with the same email, phone number, and name as a blacklisted customer won't be allowed to book online and will show as a flag on the quote in the Leads page. You can do this from the customer profile.
Here is some more information about tags.