You'll receive a notification in the Residently app once your upfront payment has been marked as received by the property manager.
If you're worried at all, or you haven't received a notification confirming receipt of your upfront payment within a few working days, please contact the property manager via the Residently app to check that your upfront payment has been received. Go to Support > Create new message > Rent/Payments > Upfront payment/move in monies.