2020 customs made Rolex warranty card , with the anti-forgery crown and fluorescent label . 
there is the NFC chip in the card , when the card closed to the NFC reader (such as some phone) , you can track the watch model in rolex website . 

with the relief printing series number (after you order , please contact us and send the series number of your watch )

the card comes with 2 Rolex information papers