With several unique codes, like the state abbreviation or military address type, there’s room for error when mailing packages or letters to military addresses. For businesses that ship to APO/FPO/DPO destinations, verifying the address is crucial in preventing missing or returned mail. With overseas addresses, the cost of missing mail is particularly expensive due to higher postage and transportation fees. Plus, for those serving, receiving a package on-time, without hassle, makes a difference.