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Last updated: February 19, 2026

Invoice Email: Send Invoice Again: Templates + Subject Lines

Tired of chasing unpaid invoices? Resending them with the right tone and timing can recover revenue while preserving client relationships. Discover tailored templates and subject lines for this delicate task.

On this page

• Quick template (short)
• Formal version
• Friendly version
• Firm version
• Subject lines
• Tips
• FAQ
• Personalized generator

Quick Template (Short)

Copy

Hi [[NAME]], resending invoice [[REFERENCE]] as it remains unpaid. Please process payment soon. Thanks, [[YOUR_NAME]].

Formal Version

Copy

Dear [[NAME]], I am writing to respectfully follow up on invoice [[REFERENCE]], which is now overdue. Kindly arrange for payment at your earliest convenience to avoid further delay. Contact me with any issues. Sincerely, [[YOUR_NAME]].

Friendly Version

Copy

Hey [[NAME]], just a quick nudge about invoice [[REFERENCE]]. No stress, but whenever you can settle it, that'd be awesome! Let me know if you need a copy. Cheers, [[YOUR_NAME]].

Firm Version

Copy

[[NAME]], final notice: invoice [[REFERENCE]] is severely overdue. Payment must be received within 24 hours to prevent escalation to collections. Act immediately. [[YOUR_NAME]].

Subject Lines (Pick one)

• Reminder: Invoice [[REFERENCE]] Still Requires Payment
• Follow-Up on Outstanding Invoice [[REFERENCE]]
• Action Needed: Unpaid Invoice [[REFERENCE]]

Tips

• Send reminders 3-5 days after due date for optimal response.
• Always include the original invoice date in the email body.
• Attach the invoice PDF again for seamless payment processing.

Related templates

More templates in the same category:

• Invoice Email: Overdue Invoice Reminder — Short, Formal, Friendly, Firm
• Invoice Email: Request Payment Status Update — Short, Formal, Friendly, Firm
• Invoice Email: Overdue Invoice Reminder: Templates + Subject Lines
• Invoice Email: Send Invoice Again (Copy + Paste)
• Invoice Email: Overdue Invoice Reminder (Copy + Paste)

FAQ

Q: How many times should I resend an invoice before escalating?
A: Limit to 2-3 polite follow-ups; then switch to firmer language or involve a collections agency.

Q: What if the client claims they never received the first invoice?
A: Resend it immediately with read receipt request and follow up via phone to confirm receipt.

Personalized Generator (Fill & Copy)

Fill in the fields to generate a ready-to-send invoice email. Example Invoice: Invoice #INV-7712.