Ubiquiti devices will have a MAC ID number printed on a small sticker or on the device itself. This information can be found on the back panel or on the underside of devices. Some devices have silicon inserts to protect the Ethernet port areas, remove the insert to expose the MAC ID. MAC IDs can also be found on the outside of product boxes.
The first 5 characters which end with a letter are the device's Date Code. The following 12 characters, a mixture of numbers and letters, will be the MAC ID. The images point out the Date Code portion in blue, and the MAC ID, in red. The QR Code in the first image is used for initial setup and is not related to the MAC ID. The barcode in the second image contains the MAC ID, but not the Date Code.
Components and parts of devices do not have MAC ID or Date Code information. In these cases, use the Serial Number (S/N) in the MAC Address space instead when using the official RMA form. Serial Number format and length will vary: some will be all numbers, others will have alphabetical and numerical characters. Identify a Serial Number by the S/N or SN in front of it. A few bundled items will not have an individual Serial Number, only the packaging box one. In these cases use the carton Serial Number for any of the items packaged within.