To comply with the Open Access to publications requirements in Horizon Europe, you need to upload a version of your manuscript on a trusted and ready-for-compliance repository. In doubt upload on Zenodo, which is compliant. If you upload the Author Accepted Manuscript on another repository first, and then on Zenodo to comply with the policy: (1) Deposit on the subject-specific or institutional repository to get attributed a DOI; (2) Deposit on Zenodo and under the section "Do you already have a DOI for this upload?" select "Yes, I already have one" and add the DOI created by your repository; (3) Fill-in all the fields as much as possible on Zenodo; (4) Don't forget to link back to the Version of Record by adding its DOI in the "Related works" section, select "Is version of", and fill-in the DOI of the publisher.