Lexmark MS810n / MS810dn / MS810dtn
Remove the jammed paper.
Note: Make sure that all paper fragments are removed.
Open the rear staple finisher door.
Close the door.
If necessary, press on the control panel.
The printer posts a paper jam error with the paper stopping at the rear door. See this article for troubleshooting steps.
Troubleshooting a 202.05 Paper Jam