The envelope number is an arbitrary, user-assigned number in ConnectNow. That means that no giving history is associated with an envelope number. The giving history is associated with the family and the envelope number is also associated with the family. When you change the envelope number for a family, they keep all of their previous giving history. When you re-assign an envelope number from an old family to a new family, the old family's giving history does not transfer to the new family and all of the new family's giving history is associated with their new envelope number.