Potentially fraudulent bill letter

[AMSJohns]

Hi,

I've just received a letter through the post, claiming to be from O2.

It is addressed strangely (using the first and last letter of my first name in the initials), is for an odd amount (£6, when my usual bill is around £15) and has a cheque slip for payment at the bottom.

It says it's a 'Notice of Full Service Restriction' and that they will be referring me to debt companies and stopping service if I do not pay the £6.

Could this be real?

[MI5 · Accepted solution]

@AMSJohns 

Call O2 for clarity.

You can reach the Payment Management team on 0800 902 0217.
The opening times are:
Monday to Friday – 8am to 8pm
Saturday – 8am to 6pm
Sunday – 9am to 6pm