What cannot be undone

Chapter 13

Everything below writes to the ledger. None of it can be edited or deleted afterwards — only cancelled by an opposite entry, which stays visible. Read the confirmation before you click.

Action	What it does	If it was wrong
Post invoice	Charges the customer, books income and tax, relieves stock	Void, reverse, or raise a credit note
Post bill	Books the cost and what you owe the vendor	Void, reverse, or raise a debit note
Post to the ledger (journal)	Writes the entry	Reverse it
Post (expense)	Books the spend and reduces the paying account	Void or reverse
Confirm delivery	Moves stock out	Reverse the dispatch
Confirm receipt	Moves stock in at bill cost	Reverse the receipt
Record adjustment	Changes quantity and stock value	Post an opposite adjustment
Finalize (payroll)	Posts salary, deductions and tax	Cannot be reversed — correct in the next run
Dispose (asset)	Posts gain or loss against net book value	Cannot be reversed
Close period	Blocks all posting into that month	Reopen — needs a separate permission
Year close	Rolls the year's result into retained earnings	Cannot be reversed. Typed confirmation required

The safe habit: save as draft, print the preview, read it, then post. A draft costs nothing and changes nothing. A posted document is permanent.

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