An affidavit is a formal statement prepared by an interested party to a court case or some other event. Preparing an affidavit is easy if you have an idea of what you need to accomplish in your testimony.
Brainstorm exactly what you would like the affidavit to say before you write it. Make a list of your topics on a separate sheet of paper and narrow down the topics into short, concise paragraphs.
Find out the name of the person that the affidavit is being delivered to. This is to ensure that your letter is addressed in a professional manner and to the correct person. Starting an affidavit with "To Judge so and so" is better than "To whom it may concern."
Gather all of the pertinent information that the letter will address. If you are referring to a court case in your affidavit, the case number, name of the defendant and petitioner and the dates of the occurrences you speak about should be included.
Format your letter with the name and address of the recipient at the top of the page. If your affidavit is for a court hearing, you will need to include the name of the court, county and the court case at the top of the page. The type of filing should be included either at the top of the letter or before your actual testimony. Adding "Affidavit of Mr. or Mrs. (Your Name Here)" is a good idea.
Take the affidavit to a notary to be notarised. This process will give your affidavit credibility and will be as good as your oral speech in a court of law.
Avoid adding unnecessary opinions that in no way could be truly verified and could qualify as slander. Saying that a person is a killer could be considered an attack on a person's character. However, saying that a person showed unusual characteristics such as sharpening knives late at night or some other eccentric quirk, similar to convicted killers, and on a specific date, could be accepted.