Hi F, original idea was to remove EVERY double posting OUT and IN. That would not affect Trial Balance as there was always a pair of postings (that between them balance to zero) removed. The only potential problem was that payments would not match Sales what never happen anyway in hotel industry. Some reservations would be overpaid and some underpaid but overall balance would be the same. We can then give to Oriel House list of reservations that have to return overpaid money or add underpaid manually and they were happy with it anyway.