If you receive an e-mail claiming to be from UPS and talking about a package they could not deliver due to a wrong address, do NOT open any attachments or links in the email! The message may come with a problem number as well as an invoice number so that it appears to be legitimate. However, UPS reports that these are fraudulent emails and that the message attachment has a virus in it. UPS asks that if anyone receives a message like this, they forward it to fraud@ups.com and then delete it.