I used to write essay-length reminder emails. People paid slower. Short + clear + link worked better than moral lectures.
Day −3: friendly heads-up with PDF + pay link. Day 0: due today, same attachments. Day +5: firm note with late policy you already stated on the invoice. Stop. Call if it's still open.
Templates I actually send
Before due: "Invoice {{number}} is due {{date}}. Link + PDF attached — yell if the PO changed."
Due day: "Due today. Same link. Reply if you need it resent to AP."
Late: "Still open. Late fee starts {{date}} per our terms. Happy to jump on a five-minute call."
Tools matter less than cadence — Stripe invoicing or Paddle for MoR shops. See Stripe vs Paddle when you're choosing rails.
What I stopped doing
I stopped apologizing for asking to be paid. I stopped CC'ing the CEO on email one.
Clear beats clever. Attach the PDF every time.



