The business should first define its own assignment clearly. The contract should record which content is financed, which statements are permitted, which disclosure is used and who controls publication. An agency may organise the process, but it does not automatically remove the business’s responsibility for unclear instructions.
The medium should also keep the commercial classification of its publication traceable. Editorial design, disclosure, advertising department and approval should not interact in a way that makes the payment relationship disappear in the finished contribution. The closer content comes to the editorial core, the more important an organisational separation becomes.
Creator, editorial team, agency and business may each contribute to publication. In a dispute, the review therefore covers not only the last visible version but also briefing, emails, approvals and requested changes. A responsibility clause helps internal organisation, but it does not replace an assessment of the actual overall impression.