This article is from the Piano Purchase and Maintenance FAQ, by Isako Hoshino firstname.lastname@example.org with numerous contributions by others.
Some dealers will regulate and tune the piano before
delivery, but not all do. The best would be to talk the
dealer into having the piano regulated and tuned before
delivery (at the dealer's place) and then have it checked and
tuned once it is delivered to your place. If you can get
this service packaged with your delivery contract, that would
be the best thing to do.
Check for any visible damages on your piano. If you see any
scratches or bruises, make a note of it on the delivery
receipt and notify the dealer immediately.