An affidavit is a written statement of facts that the person making it (called the 'affiant' or 'deponent') swears or affirms is true, usually before a lawyer, notary public, or commissioner of oaths. Affidavits are used as evidence in court proceedings, legal applications, and official government processes. Lying in an affidavit is perjury—a serious criminal offence. Government processes often require affidavits: for example, when applying for certain licenses, making immigration applications, or proving identity when other documents aren't available. Understanding affidavits helps explain why some government services require you to visit a lawyer or commissioner, adding both time and cost to administrative processes.