+Michael G. Schwern contributed cleanups, test fixes, and more.
+
+Erik Hollensbe implemented card-present data (track1/track2), the
+duplicate_window parameter, and test fixes.
+
+Paul Timmins added the check_number field.
+
+Nate Nuss implemented the ("Additional Shipping Information (Level 2 Data)"
+fields: tax, freight, duty, tax_exempt, po_number.
+
+=head1 CONTRIBUTIONS AND REPOSITORY
+
+Please send patches as unified diffs (diff -u) to (in order of preference):
+
+=over 4
+
+=item CPAN RT
+
+http://rt.cpan.org/Public/Bug/Report.html?Queue=Business-OnlinePayment-AuthorizeNet
+
+=item The bop-devel mailing list
+
+http://420.am/cgi-bin/mailman/listinfo/bop-devel
+
+=item Ivan
+
+Ivan Kohler <ivan-authorizenet@freeside.biz>
+
+=back