Credit letter is written for the purpose of taking credit. These letters are written to the banks or financial institutes. It can be long, short or medium term credit. Letters can also be used for the purpose of taking credits.
Your letter should be very much concise as no body like heavy letters as there are more chances that you letter will not be read fully by the concerned authorities. Also make sure that you are triple checking the letter for English language errors because if it is not taken good care then you will lose the authority required to convince the recipient of the letter. Your message should be crystal clear and to the point so that receiving person don’t have to wander across the content of letter to find about why you are writing this letter. A good way to avoid this mistake is to use proper subject line at the start.
Here is a sample credit letter for you to download