Got this in the inbox today. What a quaint variation on a theme.
Dear Sir,
Your company is debted to us in the area of overflight nav debts charges for the year 2007,amount 15,433.34EU.
We advice you to update us asap to enable us send Asecna new banking details for payment.
Note that faliure to hear from your company today will make us take action with your company and your flights will be grounded not operate into Africa.
Update us asap to enable us clear this debts from our debit book .
Brgds
Darren Pete
Asecna Ops