Writes 0 in tip field (no tip)
Rounds total to nearest dollar
Bill too big for change
Hits on driver
Asks for extras at the door
Porch light not turned on
Closes door mid-transaction
Says 3 words or less to me
Doesn't answer phone
Doesn't answer door first time
Yells at children/pets
Drunk or high
Pays with mostly coins
Attended high school together
Address is incorrect
Order placed in last half hour
"We usually tip more."
Calls me by name
Address not on map
Calls me delivery man/guy
Doesn't make eye contact
No gate code given
No numbers on house
Not fully clothed
Three or more answer the door