Though definitions vary across its journals, overall Oxford University Press (OUP) defines the corresponding author of a submitted paper as being responsible for:
signing the publishing agreement with OUP
arranging payment of any charges due (in the case of HSC staff, these would be covered by the Library's OUP Read & Publish agreement)
communicating with OUP while the paper is in the process of being published
answering queries about the paper after publication
The corresponding author does not necessarily need to be the author who submits a manuscript to OUP via the relevant journal website. However, a corresponding author must be specified as part of the submission process.
The corresponding author’s contact details will be made available via the published paper.