Retired 2006. This "retired" copyrighted ASC X9, Inc. document has been replaced with an American National Standard. Once retired, ASC X9, Inc. no longer maintains the document and takes no responsibility for errors, omissions or other content of a retired document. This document, including the normative annexes, establishes the file sequences, record types, and field formats to be used for the electronic exchange of check MICR line, associated check processing data and check images in the form of cash letters. This document does not address operational, implementation, or settlement issues. These issues may include, but are not limited to a choice of: data and image compression, encryption, and transmission specifications and data representation. The informative annexes attached to this document provide information that may prove useful to those planning on implementation.