Tell me about a time when old reconciling items remain unresolved for several periods. What did you do?

I first confirmed the facts and contained the immediate impact. Next, I reviewed the GL detail, supporting schedule, and aging of open items and coordinated the action to match the GL balance to the supporting schedule and investigate differences. After verifying the result, I summarized the root cause, preventive control, owner, and follow-up plan so the issue would not recur.