Reminder wording you can actually send

Subject: Quick note on invoice [Invoice number]

Hi [Contact first name],

Hope you are well. Just a short note that invoice [Invoice number] for [Amount] was due on [Due date]. If it is already in the payment run, thank you — please ignore this.

If anything looks off on the invoice, reply to this email and we will sort it.

Thanks,
[Your name]
[Your company]

Tone: assume good intent. Link to portal when your plan includes it.

Subject: Reminder — invoice [Invoice number] still open

Hi [Contact first name],

Invoice [Invoice number] for [Amount] remains outstanding as of today (due [Due date]). Could you confirm when it is scheduled for payment?

If you need a copy of the invoice or PO details, reply here and we will resend.

Regards,
[Your name]
[Your company]

Specifics help AP forward the message. Still no threats.

Subject: Action needed — overdue invoice [Invoice number]

Hi [Contact first name],

Invoice [Invoice number] for [Amount] is now [X] days past due. Please arrange payment or tell us if there is a dispute we should pause on.

You can reply to this email or use the secure link in this message (where enabled) to review the open balance.

Thank you,
[Your name]
[Your company]

In product, Firm/Final can require approval before send. See Acceptable use.