You may still be able to obtain Japan Post’s delivery certificate (配達証明, haitatsu shomei) after a domestic letter has been delivered. The key conditions are that it was sent by general registered mail (一般書留) and that the request is within one year after posting. A tracking number alone is not enough to establish eligibility. Japan Post: requests after delivery
Start with the receipt, not just the tracking result
Japan Post’s service page restricts the certificate to general registered mail. Do not assume that a Letter Pack or simplified registered item becomes eligible simply because you can see its delivery status online. The original service matters. Delivery certificate: eligible service
Read the posting receipt and identify the service before making a trip. If you cannot tell which service was purchased, ask the original post office to clarify it. Do not replace an uncertain service name with “registered” in your preparation notes.
Here is an editorial decision aid:
| What you have established | Next step |
|---|---|
| General registered mail, posted less than a year ago, receipt available | Prepare an after-posting certificate request |
| A different service, even with tracking | Do not assume this certificate can be added retrospectively |
| Service or posting date unknown | Resolve those facts before relying on eligibility |
What to take to the original post office
Japan Post directs after-posting applicants to the post office where the item was sent, with the receipt issued at posting. The after-posting charge is ¥480. Japan Post: procedure and fee
Keep the original receipt with your own note of the posting date and item number. If the receipt is missing, the sources checked here do not establish a substitute-document procedure; ask the posting office rather than assuming a screenshot will be accepted.
A sentence you can show at the counter is:
この一般書留について、差出後の配達証明を請求したいです。差出時の受領証があります。
This means, “I would like to request a delivery certificate after posting for this general registered item. I have the posting receipt.” It is an editorial language aid, not wording from an official form.
Compare the additional charges correctly
The certificate costs ¥350 when requested at posting and ¥480 afterward. The difference is ¥480 − ¥350 = ¥130. These are certificate charges, not the total cost of sending a letter. Postage and the applicable general-registration charge are separate. Japan Post: optional-service price list
For a hypothetical item already sent by general registered mail, the question is whether to pay the after-posting certificate fee now. Do not add the original postage again when comparing that decision with doing nothing. For a future mailing, compare the complete combination of postage, registration and the certificate instead.
Know what the document does not prove
Japan Post says this service certifies the fact of delivery; it does not certify the identity of the person who actually received the item. Japan Post: scope of the certificate
Suppose an organisation asks you for evidence that a named person personally received a document. Before paying, ask what evidence the organisation accepts. “Delivery certificate” and “proof of the actual receiver’s identity” should not be treated as interchangeable.
This is desk research, not a completed application or legal assessment. The sources do not establish a guaranteed issuance time for your case. Check the service, date and receipt first; then match what the certificate proves to the request you are trying to satisfy.