From the situation to a useful next step.
Here is a possible starting point. In a conversation, we can clarify the circumstances and agree my involvement.
Your selected situation
Delivered work is not always an accepted outcome.
Where we could start
I would review agreements and comments with the participants. I would distinguish confirmed conditions from new expectations and identify decisions missing for the next review.
What you would have
Questions and decisions needed to agree an acceptance process.
Who needs to be involved
The authorised client representative, account owner and delivery lead.
Roles and decisions
Specialists check implementation quality; the client approves criteria and scope changes.
Prepare an enquiry
This is an editable starting outline, not a submitted enquiry. Add your own circumstances.