be left undefined.
-=head2 Character encodings
+=head2 Character encoding
-...
+Since communication to/from Internet Secure is encoded with UTF-8, all Unicode
+characters are theoretically available when submitting information via
+B<submit()>. (Further restrictions may be imposed by Internet Secure itself.)
+
+When using non-ASCII characters, all data provided to B<submit()> should either
+be in the current native encoding (typically latin-1, unless it was modified
+via the C<encoding> pragma), or be decoded via the C<Encode> module.
+Conversely, all data returned after calling B<submit()> will be automatically
+decoded.
=head2 products_raw