Should you ever need to find a customer, you can use the search block in the 'Customers' section. Please go to Administration > Customers. There are a few search fields in the upper left part of the page (see the picture on the right):
Name, E-mail
Address
From Date
End Date
By Type
Here are a few things to keep in mind when searching customers:
In order to widen the search, you can use the %. Naturally, the option is valid only for the 'Name, E-mail' and 'Address' fields.
The 'From Date' and 'End Date' limits the time period when a customer was registered. You can type or select it from the popup calendars.
You can tell the system to search through all customers, approved and non-approved ones by clicking the corresponding radio button.
All fields are non-obligatory. You can combine them all or use separately to satisfy your requirements.