plato

Hello, I am a UK resident for tax purposes and am due to receive a one-off payment from a Greek institution. In order to process the payment, the Greek institution has requested that I fill out the following form: https://www.lawspot.gr/sites/default/files/annex_files/other/aitisi_pol-1249.pdf They have asked me to send the completed form to HMRC for stamping and signing, and then return it to me. Could you please confirm if this form is acceptable to you? Additionally, could you let me know the correct address to which I should send the completed form? Is there any other document I need to include?