If your automation has two or more triggers, the same contact can enter your automation through each trigger should they meet the conditions to do so. This results in duplicate entries for your automation, and each entry will proceed through each action in your workflow.
For example, if a contact enters into your automation through two different triggers simultaneously, they will enter the automation twice. If each contact entry moves through a "send email" action, the automation will send the email twice to the same contact. This is because they entered your automation twice.
If a contact is part-way through or has completed an automation and reenters it, they will proceed through each action. If they move through a "Send email" action, that email will resend to them.
You can prevent these scenarios from happening by configuring your automation settings:
- Click Automations on the left menu.
- Edit or create a new automation.
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Click the arrow located on the top right of the automation canvas.
- The automation settings panel will appear. Click "Edit" for "A contact can enter this automation," then select "Only once."
- Click "Save" then "Close."
Learn more about automation settings.