I have looked through the FAQs on Mandatory Reconsiderations but am still unclear as to whether a form is needed to request one.
I thought might have had a form and lost it. However, on searching for more information I have seen that you can request a Mandatory Reconsideration over the phone or in writing and I can find no mention of such a form online.
There is no form to request an MR, we recommend that you do it in writing rather than phoning there is sample MR request in the Submissions document in the ESA section.