I plead guilty to not keeping records,or rather keeping them all in one big box and storing them in the shop attic, and they burn up in the fire. But I do have pictures of projects on the shop to verify the larger equipment and then there is the charred remains the adjuster takes pictures of.
But I am really bad about keeping serial numbers,never crosses my mind until the item is stolen.
Come to think of it maybe that would help get a tool back from a neighbor who borrows it and after a year claims it as his own. HMMM........