What document will the master probably receive from the port or terminal operator after colliding with a quay, and what should be the master’s response to it?

A letter of protest holding the ship liable for the contact damage.

The master should sign this “for receipt only” and should not admit any liability, since (1) the ship may not, in fact, be liable if the reason for the damage is found to be some cause beyond the master’s control; and (2) underwriters and P&I club rules prohibit owners from admitting liability without their consent.