A Commissioner of Oaths, also known as a Commissioner for Taking Affidavits, is not the same as a Notary Public. A Notary Public has much broader authority. If your document requires the signature of a Notary Public, or you require certified copies of documents, then you will need to contact a lawyer or a notary.
The person signing the affidavit must appear before the Commissioner and must show proof of identity via government issued photo identification, with signature and not expired, such as a driver's license or passport. The person signing the affidavit must sign the document in the presence of the Commissioner.
The Commissioner cannot witness documents where there is a requirement to personally know the person for a certain length of time, i.e. Passport Guarantor.
The Commissioner is not responsible for any content of the document and does not provide legal advice, preparation or editing of affidavits, assistance, counselling or interpretation services to the person when completing their documents and shall not commission documents that are in any other language(s) other than English, as the information being sworn cannot be validated.