Incorrect MAC address on DHCP

Recently I experienced an issue: A Label Printer shows up as offline and users cannot print from it. The MAC address of the printer was given to someone who reserved a DHCP lease for it. I restarted the device and checked its ip, it didnt pick up the lease. I manually set the ip of the device and updated the print server and it came online, printing out the labels. The infrastructure technician checked the DHCP list and checked for the ip of the machine. The MAC address on the DHCP list did not match the MAC of the actual machine Is there any reason for this? I don't believe any part of this i

Question by ChristAHFER on Super User, licensed CC BY-SA. We show a short excerpt and link to the original thread as credit.