Lexmark MS810n / MS810dn / MS810dtn
Open the rear output expander door.
Remove the jammed paper.
Note: Make sure that all paper fragments are removed.
Close the door.
If necessary, press on the control panel.
Messy Output Stack in the Standard Exit Bin
The printer posts a 230.03 paper jam error with the paper stopping at the rear door. See this article for troubleshooting steps.