I'd cut short on whatever may lead them to believe there may be something not 100% exact in what you are stating... To the best of your knowledge, which is probably better knowledge that anyone else's, THAT IS THE TRUTH, so stand firm on that !
"I solemnly declare that the following facts are the truth : "
Printed copy · Anthology Volume 8, page 659Printed copy from The Tender For Law Anthology, Volume 8, page 659 (printed 13 June 2014). Added by this site; not part of the Facebook export.