Grammar & Punctuation – addresses.

Styles for the presentation of addresses in letters and on envelopes have changed over the years. Recommended practice is to set addresses with the left hand end of lines square (‘left justified’) and without any punctuation:
Oxford University Press
Great Clarendon Street
OXFORD
OX2 6DP
The postcode is placed separately, on a line of its own, except in the case of London addresses, where it is normally placed on the same line as London:
LONDON WC1 6GE .
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