Use of non-brother/generic supplies MAY cause print quality problems and/or early failure. Brother supplies are designed specifically for the unique print mechanism that the Brother unit utilizes. You may usa generic supplies, however, for premium print performance, genuine Brother supplies are strongly recommended. If you choose to use generic supplies, our warranty coverage does not apply to any problem that is caused by the use of non-Brother/generic supplies. To Protect your investment and guarantee your print quality, continue to use Genuine Brother Branded Supplies.