Had a campaign running August through October last year with a network I'd been with about a year. Ended it, moved on, got paid on time every cycle, nobody said a word.
Yesterday I get an invoice adjustment. Negative $2,340. Reason field says 'quality review - retroactive'. That is the entire explanation. Three months after the last conversion fired and four months after the campaign stopped.
I've never had one land this late. Everything before has come inside the following cycle, occasionally the one after. Is there actually a limit on how far back they can reach, or is it just whatever the contract says and I never read it properly?