You don't need to. You address it to the corporate HQ and let the mail room deal with the proper routing within the organization. For example, Southwest. htt

You don't need to. You address it to the corporate HQ and let the mail room deal with the proper routing within the organization. For example, Southwest. https://www.southwest.com/html/contact-us/index.html?clk=GFOOTER-CUSTOMER-CONTACT-US https://www.southwest.com/html/contact-us/index.html?clk=GFO... Write us Have extra stamps? Send us a letter. P.O. Box 36647-1CR Dallas, Texas 75235 And so: Manager - XYZ airport customer support c/o Southwest Airlines P.O. Box ...