Right-click the date and choose Toggle Field Codes. Inside the field,
change DATE to CREATEDATE. Right-click again and choose Update Field.

If you use a template to create these memos, change the template in
the same way so all new memos will already have the right field.
Changing the template won't affect any existing memos, though.

See http://www.word.mvps.org/FAQs/TblsFldsFms/DateFields.htm for more
info.

--
Regards,
Jay Freedman
Microsoft Word MVP        FAQ: http://word.mvps.org
Email cannot be acknowledged; please post all follow-ups to the
newsgroup so all may benefit.