List the date followed by your legal name, date of birth, address and phone number. This will identify you as the affiant, the person writing the sworn affidavit.
State the facts. Do not include your feelings or opinions. Instead of writing that someone was angry, describe what the person was doing that made you feel he was angry, such as noting that the person was throwing items, breaking things and screaming. Include all of the factual information you have about the situation.
List a court and case number of a given case at the end of the document. If you do not know the case number, list the name of a plaintiff or defendant.
Include any written proof you have. This will be added to the document as part of a case's exhibits. The proof you have can be in the form of emails, letters, or photos.
Take the affidavit and any written proof supporting your statements to a notary public. You can find a notary at most banks or FedEx offices, as well as courthouses. Present your photo ID and all documents. Then sign the document in the notary's presence.
Make two to three copies of the document and provide the original to the court or to the party involved in the court case.
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