1. Low quality thin or thick paper or not printing on the recommended side of the paper could cause this problem. Try turning over the stack of paper in the paper tray. Make sure that you choose the Paper Type that suits the media type you are using.
   
   
2. High temperature and humidity will cause paper to curl. The Brother machine should be operated within the following ranges: temperature 50 to 90.5 F; humidity 20% to 80% without condensation.
   
   
3. If the printer is used infrequently, the paper may have sat for too long in the paper tray.
   
   
   1. Pull the paper tray completely out of the machine.
   2. Remove any paper inside the tray.
   3. Turn the stack of paper over and rotate it 180º
   4. Fan the stack of paper well and reinstall in the paper tray.
   5. Adjust the paper guides to fit the paper.
   6. Put the paper tray back into the Brother machine.

If the issue is not solved, continue to Solution 2.

Solution 2:

Change the "Media Type" setting in the Printer driver.

For Windows Users:

1. Choose [File] => [Print] in your application software.
2. Choose your model name and click Properties or Preferences.
   (Document Defaults for Windows NT 4.0)
   The Printer dialog box will appear.
3. Select Recycled Paper or Thin Paper at the Media Type, and click OK.
4. Click OK.

For Mac OSR X Users:

1. From application software, click the File menu and choose Print.
2. Press Copies & Pages dropdown to choose Print Settings.

3. Press Media Type dropdown to choose Recycled Paper or Thin Paper.

4. Click Print.

For Mac OSR 9.x Users:

1. From application software, click the File menu and choose Print.
2. Select Recycled Paper or Thin Paper at the Media Type, and click Print.