This is a sample of the cover letter I use and it works for me. I hope it does for you too. Goodluck.
Your Address
(Leave a line)
Prospective Employer's address
Dear Sir,
RE: APPLICATION FOR THE POST OF AN ACCOUNTANT I YOUR ORGANIZATION
In response to the job advertisement on the career website www.nigeriacentre.c om in September 2011, please find attached my CV for the position of an Accountant in your organisation. I am a young, energetic, resourceful and organized lady/man working with my initiative and team to achieve company objective.
I graduated from the University of Jos with a Second Class Upper in Accounting. I also possess an ICAN certificate.I'm also a member of the Nigeria Institute of Management.
As a former Accountant, I was responsible for (fill in the blank of what you did in your previous place of employment) and this I did effectively.
Please view my cv for other relevant details you may require . I am sure you will find my qualifications and qualities beneficial to your company. I, therefore, look forward to joining your widely acclaimed and customer-friendly organisation.
