Today one of my large investor client had moved all of his investments from 9 different investment accounts into 7 new ones and then rebalanced his portfolio.  Not a big deal to enter 16 investment 1099's, just slow.  But the investment house issues two 1099's for each account with exact same numbers. I ask the client - for joint accounts they split the 1099's into two.  So now I have 9 + 7 + 7 = 23  investment accounts. Makes you wonder.