Computers Ltd

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Invoice Scam

This is similar to the email attachment scam but in this case you receive an email which either states it has an invoice, shipping note or similar attached. It may even be threatening court action for late payment of something.


or you get this


The problem here is the attachment. It’s a DOC file which contains a Word MACRO which is going to do something nasty to your system.

Never open a DOC, DOCX or XLS file which you receive off the internet even if you think it’s genuine. In this case you could save the file and then scan it with your anti-virus software before you open it.

And never think that something is genuine even if it purports to come from someone you know. The only way to verify that the email came from someone you trust is if it is digitally signed.

In Outlook you will see this in the list of messages. Look for this symbol -


When you open the message it will also be here -


Clicking on it reveals this -


Clicking on details reveals more -


And clicking on the signer reveals this -


If the certificate is fake or it has been tampered with then it will tell you. The certificates have a 'valid until' date so you will also be told if they have expired.

A signed email is virtually impossible to falsify.
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