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.
First cousins are two children who share a set of grandparents, but have different parents. Double first cousins share both sets of grandparents, but have different parents. Let's state that in a different way: double first cousins happen when two siblings of one family marry two siblings of another family. When you and your brother marry Bob and his sister, your children and their children will be double first cousins. Many states in the USA allow first cousins to marry *; but as far as I can find only one, North Carolina, will allow cousins to marry but will not allow double first cousins to marry.