Authentic Lexmark Return Program toner for printers:

• Lexmark Laser Printer CS 317, 317dn, 417, 417dn, 517, 517de, 517dn
• Lexmark Laser Printer CX 317, 317dn, 417, 417de, 417dn, 517, 517de, 517dn

The toner cartridges that fall under Lexmark's return program are printing toners sold at a reduced price, on the condition that the customer accepts that the cartridges will be used only once and returned only to Lexmark for refurbishment or recycling. These single-use toners stop functioning when they reach the end of their rated life, as determined by Lexmark (there may be a variable amount of toner remaining in the cartridges when replacement is required). These toners can also automatically update the printer's memory to protect it from counterfeit and unauthorized products.