1) Act of civility 2) An act of civility or respect 3) Civility 4) Formal expression of respect 5) Politeness 6) Respects or compliments 
what is due; duty
• (n.) Duty; service owed; hence, due act of civility or respect; -- now usually in the plural; as, they paid their devoirs to the ladies.
De·voir' noun [ French, from Latin debere to owe. See Due .] Duty; service owed; hence, due act of civility or respect; -- now usually in the plural; as, they paid their devoirs to the ladies. 'Do now your devoid , young knights!' Chaucer. 
[n] - formal expression of respect
noun formal expression of respect
an act of civility or respect. · respects or compliments. · something for which a person is responsible; duty.