[header] How to reissue an invoice [title] Identify what information has changed. [step] For example, someone might have increased their order, or you made a mistake on the original invoice. Go down through each piece of information on the invoice and look for changes to any of the following : [substeps] Client information amount due payment deadline description of goods or services provided [title] Correct the invoice. 
[step] Go into your invoicing software and update whatever information needs to be changed. You should change the invoice number so that it reflects that it has been revised.