Check image format used by NationsBank that contains compressed image data and ASCII text; includes information that describes the check issue date, paid date, and amount of each check in the file.
BTIF files also use the .BTF extension.
Program(s) that open btif files
Windows: Web browser with NationsBank Check Viewing plugin
Information from FileInfo.com - The File Extensions Resource.
http://www.fileinfo.com/extension/btif
