Recipient's Address in a Cover Letter
Position: on the left
Ms / Miss / Mrs / Mr / Dr ...
company
street
place
area code
COUNTRY (in capital letters)
In American English, the area code is usually at the same level as the place, separated by a comma.
Sometimes the name of the company is put in the first line and the name of the addressee in the second, preceded by attn (attention) or FAO (for the attention of), e.g. attn Mr Johnny Welsh. You are on the safe side if you copy the address exactly in the way it is given in the job application.
British English
In British English, the recipient's address starts on the same line as the date or one line below the date.
Example:
American English
In American English, the recipient's address starts two lines below the sender's address (or two lines below the date if the sender's address isn't placed in the top left corner).
Example: