Cancelling Invoices?

How do you cancel an invoice? I thought I read something about there being a way to cancel invoices and was wonder if there was a way to do that since a company I’m doing business with sent an invoice to the wrong company and I didn’t catch that until after I had accepted it.

@Lifeline_Inc, You can, but you have to wait for the completion date to lapse first before the cancel button shows up on the PO.