Hi elena-indent,
 
You can generate a Statement List Report to find the exact statement you sent a month ago, and resend it again.
 
To do this:
 - Navigate to Reports on the left menu.
 
 - Under the section Who owes you, select Statement List.
 
 - Select the Statement Number of the statement that corresponds to the desired statement date.
 
 - Select Send if you want to send the statement to the customer again.
 
Hope this helps!
 
Bonny