Translations:Adventist Youth Honors Answer Book/Outreach/Christian Grooming & Manners/23/en
From Pathfinder Wiki
f. What to say when you answer the door
When answering the door, if the visitor has come to speak to an adult in the family and he is known to you, invite him in while you get the person requested. If the visitor is unknown, kindly ask him to wait until you can get the person requested. If no one else is home, tell the visitor so only if you know the visitor, and ask if you can relay a message for him.