Honoring during business and chore performance:
One is obligated to respect his parents during his business dealings and performance of chores. Hence, if one is in need of a certain matter from another person, then he should request from them to do it out of respect for his father [as explained next]. All in all, a person should always make it seem in his words that he worries of the honor of his father and fear him.
 Tur Y.D. 240; Rambam Mamrim 6:4; See Encyclopedia Talmudit Erech Kibud Av Vaeim Vol. 26 p. 388-390