This Practice Note covers how information contained in a document or statement made by or on behalf of a person, can be relied on where there is a requirement to validate its authenticity in a commercial context. There are a number of ways to validate information and documents and this Practice Note explains when statutory declarations, oaths, affirmations and affidavits may be used; how to check that these have been correctly prepared, and includes guidance for practitioners when using these methods of validation. This Practice Note looks at the requirements for the following: • Statutory declarations • Oaths • Affirmations • Affidavits • Formalities for administering statutory declarations, oaths, affirmations and affidavits • Statutory declarations and affidavits out of jurisdiction For information on notaries, their purpose, steps required to notarise a document and the meaning of legalisation, see Practice Note: Notaries and notarisation. For guidance on certified copies, including what a certified copy is, when is a certified copy required, who can certify a document, what format the certification should take, use of certified copies