[header] How to prove perjury [title] Verify the statement was made under oath. [step] If the person who made the statement was testifying in court, or before a grand jury, the statement was made under oath. Anything written on a government document is also under oath if the person signed the document. 
[substeps] Generally, government forms you have to fill out will contain a statement at the bottom that your signature is verification that the information you provided is true and accurate to the best of your knowledge. False statements on a form with that statement could lead to perjury charges.