I have my staff keep tenant files for seven (7) years. After each tenant moves out managers are to staple all of their records (lease agreement, addendums,copies of late notices, receipts,certified notices, etc.) together and file them away in a box(es) with the year written on the outside. The boxes are also segmented by month to ease the process if we have to go back and find old tenant file. These boxes are stored in a spare 5x5 until they have been held for 8 yrs and then we shred them all.