HAL is the multidisciplinary French national open archive for all academic documents, published or not published. HAL contains more than 1.175.000 files of articles, preprints, conference papers, images etc… HAL is a pillar for the national open science policy. The first (2018) and the second (2021-2024) french plans for Open Science highlighted the need for HAL to simplify the deposit process for researchers, even when they publish in other open access platforms across the world, by developing an integrated self-archiving service, with automated targeted harvest of publications. This project is funded by ANR (https://anr.fr/en/), the French national research agency (ANR 21-ESRE-0047). For this purpose, we are developing a service that suggests to researchers some of their documents available in other platforms, with the possibility of easily depositing them ino HAL. In this talk, we will give an overview of the service, and will highlight how we have addressed some technical issues in order to build it, the steps we still have to take and the problems we are facing.