Yamaha stamps the serial number for each grand and vertical piano on a gold-colored plate inside the piano in the area behind the higher octave keys. For digital or electronic pianos, Yamaha prints the serial number on a white sticker underneath the keyboard.
An individual views a grand piano's serial number by removing the sheet music rest and looking inside the body of the piano. A player can access a vertical piano's serial number by opening the top lid of the piano and peering inside. The serial number on a digital piano's white sticker includes a model number and electrical information.