If you are on a Mac, avoid the official "Apple AirPrint" fix—BC-809 units rarely support AirPrint natively. Instead, install (an open-source driver bundle). It contains legacy drivers for hundreds of obscure Chinese and Korean printer boards, including many BC variants.
In 90% of cases, the BC-809 uses a generic chipset. Here is how to force Windows to find it:
Check the "Spooler" settings in Windows. Sometimes setting the printer to "Print directly to the printer" can speed up receipt generation in busy environments. Maintenance Tips