Whenever a client opens an invoice, or an estimate, you sent for the first time, you will receive an email notification telling you the invoice has been seen. You won’t even need to open Nutcache!

And when you are in Nutcache making your business grow, you can always check out a specific invoice history from the Activity tab to see its status and when it was sent or viewed.

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Or you can check your notifications from the Notification center: