Try this
- Open the service’s sharing controls and identify current recipients, public links and account ownership.
- Agree on any changes before removing someone’s access to their own material. Verify the result in the relevant service after updating it.
A worked example
“Before adding the new photos, let’s check whether this link is private to us or still shared with the group from last year.”
An invented example to adapt, not a real exchange or a script you have to follow.
Before you leave it here
Do not infer privacy from the album title or an old setting. Access can differ across copies, links and services; record only what you verified.