Contacts can have multiple addresses for work, home or any office/department location (for example, Accounts Payable).
Do the following to add an additional address for a contact:
Click Contacts on the navigation bar.
Locate the contact record using the Contacts List or select Find from the Action drop-down to search for a record.
Click Add 
next to the right-most tab.
Enter a name for the new tab (for example, A/P) and click OK. The contact's main name, company, title and type are copied to the new tab.
Enter mailing detail (for example, name, address, etc.).
Select the Billing check box to designate the information on this tab as the billing address or the Mailing check box to designate this as the main mailing address.
Click Save.