There is magic marker on the inside of her right hand, see 2nd photo.

The Barbie 2015 Birthday Wishes Silver Label Doll is a rare and highly sought-after collectible piece. This fashion doll features a hybrid body made to move, as well as a nude design that allows for customization. The doll is part of the Barbie franchise, manufactured by Mattel in 2015, and includes features such as a silver label designation. With a straight blonde hair, straight body, and gender-neutral design, this Barbie doll is a unique and special addition to any doll collection, perfect for celebrating birthdays and anniversaries.