From Rothgar on the EQ2 Forums:

Customer Service will be investigating reports of players making use of a duping exploit.  If you’ve been found using this exploit, your character may be rolled back several days.

You should always be aware that using an exploit can result in suspension or bannings regardless of what the exploit is.  If you’ve stumbled across something on your own or heard of an exploit from a friend, your best bet is to petition CS about it right away and cease that behavior.