I don't mind sharing but there are so many examples online for anyone searching 'cancellation letter template' I don't see the need. It's a completely standard business letter that you keep very short and to the point. Include your account numbers and do not bother with providing a reason unless you are exercising your 'get out free' option for a rate hike on a term contract. The shorter the better. Read the contract from the service provider and have a copy of your most recent bill to refer to for account details, and make sure the reader has enough info to process your request properly.

Note that this works best for small-time stuff like broadband or mobile phone plans, if you have a lot riding on it you are better off talking to a lawyer and paying for an hour or two of their time.

Sample text,remember to keep it very short and to the point:

<your address>

<their address>

<date>

Notice Of Cancellation Of Service (or alternate subject line, use bold print this line only)

Dear Sir or Madam, (or preferably a name if known)

I am writing to cancel service under account number <?12345?> in my name at the above address effective <insert date>.

(optional paragraph) I will return your equipment to your office on the same date and obtain proof of delivery.

(optional paragraph) I reject your rate increase of <insert specific detail here>. You forfeit the Early Termination Fee due to the following materially averse change to our previous agreement: <insert reason here> (It CANNOT be a sales tax increase or anything outside their control but can definitely be an increase in any silly and vague 'regulatory' fees, etc. A classic example is an increase in SMS fees from 5¢ to 10¢, regardless of whether you actually went over your allowance and paid an overage yet. They may offer to waive this but you are not obliged to accept - they chose to alter the deal and they broke their contract, not you)>

Sincerely,

<name & signature>