A post office visit in Korea is straightforward when you arrive with the right information. The difficult part is usually not the counter itself. It is deciding which service you need, whether the item can be mailed, what information belongs on the shipment, and what to keep after you hand it over.
This guide treats Korea Post as a sending process rather than a list of services. It covers domestic parcels and documents first, then international shipping, customs information, restricted items, tracking, and what to do when a shipment does not move as expected.
1. Choose the Service by What You Need to Prove
“I need to mail this” is not enough information to choose a service. Think about what matters after the item leaves your hands.
2. Domestic Parcel: Prepare the Handoff Before You Reach the Counter
Use a suitable box or envelope, protect fragile contents, remove confusing old labels, and close the package securely.
Name, complete Korean address, detailed unit information where needed, ZIP code, and a usable contact number.
Use a return address and contact details that will still be valid if the item cannot be delivered.
Size, weight, packaging, destination, and service type can affect acceptance and price.
Do not discard them just because the parcel has left the post office.
3. Address Errors: Part 5 Tells You the Format; Part 6 Tells You What the Parcel Needs
For the Korean address system itself, use Part 5 · Korean Address Guide. At the post office, focus on whether the shipment contains enough information to reach the correct person and to return the item if delivery fails.
| Domestic shipment | International shipment |
|---|---|
| Recipient name, verified Korean address, detailed address where needed, five-digit ZIP code, and contact information requested for the service. | Recipient name, destination-country address in an accepted format, postal code, country, contact details, plus sender/return information. |
| Do not omit the apartment building/tower or unit simply because the main road-name address is correct. | Do not translate or rearrange an overseas address from memory if the recipient can provide the exact mailing format. |
4. International Shipping Starts With the Destination Country
Do not pack an international parcel first and ask about the rules last. The destination determines which services are available and can affect prohibited or restricted items, customs treatment, delivery practices, and whether special documentation is needed.
① destination country → ② available postal service → ③ whether the item is accepted → ④ size/weight constraints → ⑤ customs information required → ⑥ recipient address and phone details → ⑦ realistic delivery expectations.
EMS is available to many destinations, but coverage should be checked for the country you are actually sending to rather than assumed from a general description.
5. Customs Declaration: Describe What Is Actually in the Box
International goods do not cross borders on the strength of an address label alone. Customs information connects the physical contents of the parcel to the declared description and value.
| Weak description | More useful description |
|---|---|
| Gift | Describe the actual contents; “gift” explains the purpose, not what the item is. |
| Stuff | List recognizable item types and quantities. |
| Clothes | Use a clearer description such as shirts, trousers, or other actual contents where the form permits. |
| Value guessed from convenience | Declare the value accurately according to the shipment requirements. |
6. Restricted and Prohibited Items: “The Counter Accepted It” Is Not the Final Test
International restrictions are one of the areas where old blog posts become dangerous. Rules vary by destination and can change. Korea Post guidance specifically warns about prohibited or restricted categories and destination-country import rules.
7. Packing: Prevent Damage and Prevent Ambiguity
Good packaging has two jobs: protect the contents and make the parcel easy to identify and process.
Remove or cover old shipping labels and barcodes. Protect fragile items from movement. Separate liquids appropriately if the service accepts them. Do not let the outer box suggest a different restricted content—for example, reusing a produce box for unrelated international contents can create unnecessary inspection questions.
For international food or fragile shipments, acceptance does not guarantee that customs delays, temperature changes, pressure changes, or destination handling will leave the contents unaffected.
8. Registered Mail: Tracking and Proof Are Not the Same Thing
Registered mail is useful when a document matters, but think carefully about what the receiving organization requires. A tracking page can show postal movement and delivery status; a formal procedure may require a specific proof-of-delivery or delivery-certificate service.
9. Tracking: Read the Status as a Logistics Event
Korea Post uses shipment numbers for tracking registered mail, parcels, and EMS. Domestic tracking records can show events such as acceptance, dispatch, arrival at a sorting facility, preparation for delivery, and delivery.
| Status pattern | What to consider |
|---|---|
| Accepted but little movement | Check how long it has been, weekends/holidays, service type, and whether the item has actually left the originating facility. |
| International item left Korea | The next useful scan may come from the destination postal/customs system rather than immediately from Korea. |
| Held in customs | This is not the same as “lost.” The recipient may need to respond to the destination authority or postal operator. |
| Delivered but recipient cannot find it | Check the recorded delivery details and the destination's local delivery practice before assuming loss. |
| No useful update for an abnormal period | Keep the receipt and shipment number and use the inquiry process for that service. |
10. International Delay: Find Out Who Has the Parcel Now
An international shipment can pass through Korea Post, export transport, the destination postal operator, customs, and local delivery. When something stops moving, the useful question is not simply “Where is my parcel?” but which organization currently controls the next step?
11. Returns, Customs Refusal, and Undeliverable Mail
An overseas parcel can come back because of an address problem, refusal, import restriction, failed customs clearance, recipient issue, or another destination-specific reason. A returned parcel does not automatically mean the postal service made an error.
Likewise, customs delay or refusal can create costs or losses that are outside ordinary delivery guarantees. Before sending an expensive, perishable, regulated, or time-critical item, consider the consequences if it is delayed, returned, or not admitted by the destination country.
12. Useful Korean at the Counter
| Korean | Use |
|---|---|
| 소포 보내려고 해요. | I'd like to send a parcel. |
| 등기로 보내려고 해요. | I'd like to send this by registered mail. |
| EMS로 보내려고 해요. | I'd like to send this by EMS. |
| 이 물건을 해외로 보낼 수 있나요? | Can I send this item overseas? |
| 상자를 살 수 있나요? | Can I buy a box? |
| 운송장 번호가 어디에 있나요? | Where is the tracking number? |
Prepare the address and item information in writing even if you plan to use Korean at the counter. Clear written information is more valuable than memorizing a long sentence.
13. Before You Go to the Post Office
□ I know whether I need ordinary mail, registered service, a parcel, or international express.
□ The recipient and return addresses are complete.
□ I have the phone/contact information required for the shipment.
□ For international goods, I know exactly what is inside, the quantity, and the value.
□ I checked unusual or potentially restricted items before sealing the package.
□ The packaging is suitable for the actual contents and journey.
□ I will keep the receipt and shipment number until the transaction is truly finished.
Source & Verification Notes
Reviewed: September 2026.
Official verification: current Korea Post materials were checked for domestic registered/parcel tracking, EMS destination availability, international-mail precautions, prohibited/restricted categories, customs risk, and the distinction between online tracking information and formal delivery proof.
Information that can change: rates, country coverage, delivery standards, customs requirements, prohibited/restricted items, compensation, packaging rules, and service availability can change by destination, item, and postal service.
Editorial boundary: this guide explains how to prepare and manage a postal transaction. Part 5 remains the detailed Korean-address reference; this article does not duplicate it.