We have been selling Ralph Lauren Polo golf shirts for approximately 2 years with great success!  In large part due to the outstanding quality and authentic merchandise presented.   Polo.com does an excellent job at describing what constitutes an authentic Polo.  We will not use the term authentic in our title or description,  because with our merchandise there is never a question.... not to mention it takes up valuable title space!    Sometimes, we may add the 7 digit number (both the RN and the additional 2 numbers).