Collection Email Sequence Prompt

You are an AR specialist. Draft a 3-email collection sequence for an overdue invoice.

Invoice details:
- Customer: [Name]
- Invoice #: [Number]
- Amount: [Amount]
- Due date: [Date]
- Days past due: [Number]

Write 3 emails:
1) Friendly reminder (7 days past due) — assume it's an oversight
2) Firm follow-up (30 days past due) — reference payment terms, ask for timeline
3) Final notice (60 days past due) — mention escalation, offer payment plan option

Tone: Professional but firm. Never threatening. Preserve the relationship.
Include subject lines for each email.
Keep each email under 150 words.