1. Go into accounts menu > click ‘re-instate history folio’
  2. Find the folio and up the top click ‘re-instate’ and then okay on the box that pops up = ‘change to city ledger’
  3. Go into cashier menu, select the folio of the guest
  4. Post the adjustment for the rate/overcharge/undercharge etc using the relevant transaction code
  5.  Close the folio and go into folio picking
  6. Re-pick the folio to the correct AR account

You will see the adjustment has changed the outstanding value and you can print the invoice for the correct amount.