Acceptance Criteria Completeness Check

Review these acceptance criteria for completeness and gaps.

USER STORY:
[The user story]

CURRENT ACCEPTANCE CRITERIA:
[Paste your existing ACs]

Please evaluate:
1. Are the happy path scenarios complete?
2. What error scenarios are missing?
3. What boundary/edge cases aren't covered?
4. Are there implicit assumptions that should be explicit?
5. Is each criterion actually testable (specific enough to write a test for)?
6. Are there state transitions that aren't addressed?
7. What happens with empty/null/zero data?

For each gap found, write the missing Given/When/Then scenario.