The California Proof of Mailing Affidavit is a document used to prove that an item was sent to an intended recipient. It is often used in legal and business contexts to provide evidence that an item was sent. There are three main types of California Proof of Mailing Affidavits: a domestic affidavit, which is a form used to prove that an item was sent domestically within the United States; an international affidavit, which is a form used to prove that an item was sent internationally; and a registered mail affidavit, which is a form used to prove that an item was sent via registered mail. Each type of California Proof of Mailing Affidavit includes the date the item was sent, the name and address of the sender, the name and address of the recipient, a description of the item, and the signature of the sender. The sender must also provide proof that the item was sent, such as a receipt from the post office or a tracking number. The affidavit must be notarized by a notary public in order for it to be legally valid.