DT US Individual form, tracking status

After HMRC have received my DT US Individual Form, that has been stamped and processed by the IRS in the USA. Will I receive a letter or some kind of confirmation from the HMRC, that the DT US Individual form has been successfully processed by HMRC and the relevant information forwarded to my pension provider, so that no further income tax is removed on any withdrawals made from my UK pension? Is there a contact number I can reach out to, to verify the DT US Individual form has been successfully processed or if I have any questions?

Hi

Once received by HMRC and processed, you will receive written confirmation of any actions and if applicable, a code of NT will be issued to your pension provider.
As the US forms are not scanned on our system, we wont know  if its been received until it is actually processed. The contact number is +44 13 5535 9022

Thank you