Why this works
- Thank them first. A partial payment is good faith; acknowledge it.
- Clarify whether it was a mistake (wrong amount) or deliberate (cash-flow), because the fix is different.
Useful tools for this stage
- Late payment interest calculator — the exact interest and compensation to quote.
- WhatsApp & SMS reminder generator — for clients who ignore email.
- Letter before action generator — when reminders have run out.