For an appearance during the off-season, the calendar, training plan and contract clause may be important. For a post-match press conference, the club instruction, occasion and player’s role also matter. At a sponsor event, it should be clear whether the club is the organiser or merely arranged attendance.
A private invitation to speak about a personal subject is another special case. Content and the source of the obligation become particularly important. A general club rule may be relevant, but it does not automatically answer every question about private communication. A last-minute cancellation or change of organiser should also be recorded.
Keep the complete contract and amendments, invitations, emails and messages, approvals, refusals, calendar and training records, recordings and a timeline. The article on player image rights and social media addresses a different focus, but may help where a separate image or campaign issue arises.