Why does my invoicing software keep sending duplicate reminders?

Updated October 2026 · How we answer

Checking the reminder rules

Open the reminder settings and look for more than one rule that applies to the same invoice. A rule for overdue invoices and another for upcoming due dates can both fire on the same day. Keep one clear sequence of reminders for each invoice type.

Also check whether invoices are set to send reminders both manually and automatically. Some tools allow both, which creates repeats if a team member clicks send by hand while automation is running.

Clearing up duplicate sends

If you use a connected app, such as a payment tool or email service, the same event may trigger a second message. Review the connected integrations and disable any that are not needed. Test with a single draft invoice before you change settings for live customers.

Once the fix is in place, watch the next few reminder cycles closely. A quick check over one billing period confirms the problem is gone. Keep a short log of what changed so you can roll back a setting if needed.

• Look for overlapping automatic reminder rules.
• Turn off manual sends if automation is on.
• Review connected apps for duplicate triggers.
• Test with a draft invoice sent to yourself.

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