Review the history
Check the intended recipient, addresses, attempt details and explanation of the outcome. Ask about omissions or inconsistencies rather than assuming that every requested step occurred.
Distinguish a visit from closeout
A single unsuccessful attempt does not necessarily mean the request is closed. Confirm the remaining agreed scope and whether further instructions are needed.
Decide the next step with guidance
A nonservice document does not itself authorize a different method of service. Consult your legal adviser or appropriate official resources before changing strategy.