to come to someone's door to settle a matter or confront them

a fee charged for a service provider, such as a technician or doctor, to visit a customer's home or location

to introduce a potential source of trouble or an untrustworthy person into one's home or affairs; literally to invite a ghost or devil to one's door

bricks-and-mortar customer; walk-in customer

to close the door (behind oneself when entering or leaving)