There are times when you should request copies of your records: 1  Permanent Change of Station. 2  Deploying. 3  Retiring.
0. EXPERT ANSWER. Double coincidence of wants refers to a situation in a barter system where the goods or services offered by a seller are exactly the same as that required by a buyer and vice versa.
coincidence noun (SAME TIME) B2 [ C ] an occasion when two or more similar things happen at the same time, especially in a way that is unlikely and surprising: You chose exactly the same wallpaper as us - what a coincidence! Is it just a coincidence that the wife of the man who ran the competition won first prize?