Hi, i was living and working in the UK from 2018-2023 however i didn't inform the greek authorities regarding that. During this period I didn't own any assets nor received any income from the greek state during this period. Now i'm trying to inform and make an application to inform retrospectively and as part of this process requested from HMRC a certificate of tax residence to provide it to greek authorities as evidence. I am aware that i will need to validate this certificate with an apostille however on an official documents that instead of the certificate of tax residence i could request a form for the double taxation avoidance agreement to be completed by HMRC without the need to obtain an apostille. Is that correct and if so how can i request it? Please note that currently i live and work in Ireland which makes things more difficult in terms of posting documents etc. Thank you for your time in advance