Refusing (declining) an invitation

Here is a sample letter to refuse an invitation

Dear Sirs,

I am pleased and honoured by the invitation to participate in your conference. I very much
regret to say that it will not be possible for me to participate this time. Between 20th and 30th June 2012. I am giving a series of

Invitation to a conference

Here is a sample business invitation letter. This letter is for reference only.


Dear Mr Smith,

I am writing on behalf of the Organising Committee of the 5th International Conference on Information Technology.  The conference will take place from 25 to 28 June 2012.

Please find enclosed the programme and