How to address envelopes with attn<br>Write " attn " followed by the name of the recipient. The " attn " line should always appear at the very top of your delivery address, just before the name of the person you're sending it to. Use a colon after " attn " to make it clearly readable.

Can we draw the following conclusion?
If you don't use a colon after the abbreviation, delivery will be slowed.

Pick your answer from: -- Yes. -- It's impossible to say. -- No.
It's impossible to say