The customer's AP system kicking an invoice back entirely — wrong PO, missing fields, absent backup, or non-compliant format. The clock on payment restarts from zero.
Why it matters before the job moves
Every rejection adds weeks to DSO. Most rejections are formatting and completeness — fully checkable before you hit send.
Software for the boring operational stuff.SYNNR builds purpose-built software for oilfield service companies. Start with TallyShot — photograph a handwritten tally sheet, get clean Excel back.