Please do not open any emails you receive which have Word attachments which purport to be invoices from anyone you do not recognise.
Staff at the University have received numerous emails of this kind recently. The IT helpdesk has advised that the attached MS Word document in one such email contained a macro which would have infected a PC.
If you receive an email of this type and do not recognise the sender, then please delete immediately. If in doubt, contact the IT helpdesk.