You can send an invoice directly from Mews if the BILL IS CLOSED.
STEP 1: Sign in to Mews using your login credentials.
STEP 2: Locate the guest's reservation.
Under the Status tab, click on Payments.
STEP 3: Determine and click which bill you want to send to the guest.
STEP 4: Click the envelope icon on the upper right side.
STEP 5: Tick the checkbox.
You have the option to add another email if the guest requests so.
Click Send when done.