Error of omission
This is when an entry is completely missed out of the books
Reversal of entries
This is when the debit and credit entry have been entered the wrong way round
Error of commission/mispost
Amount entered in wrong named account
Error of principle
This is when the wrong classification of account has been used
E.g. the cost of fuel £30 has been debited to Vehicles a/c
Error of original entry
The original amount was wrong in both accounts
Compensating error
This is when accounts that are one debit and one credit are both too high (overcast) or too low (undercast)
What are the errors that are revealed by a trial balance