如何邮寄信件或明信片：国际
When you send a letter from the U.S. to another country, the address may be a little different, but it's still easy and affordable: it only costs $1.65 to send a 1 oz letter (or postcard) using a USPS® Global Forever® stamp.
For mail to U.S. destinations (including U.S. territories and APO/FPO/DPO addresses), see How to Send a Letter or Postcard: 国内。
For instructions on how to ship a package to another country, see How to Send a Package: 国际。
Send International Mail: 逐步说明
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第 1 步：Ask, "Can I Send This?"
Different countries have different rules on what they’ll allow in. Look up your destination country in the Index of Countries and Localities to make sure you’re following their rules.
If you’re just sending correspondence (no trading cards, bookmarks, stickers, etc.) or nonnegotiable documents (just paper; no cash, checks, or other items that have cash value), you don’t need a customs form.
提醒： You can only use First-Class Mail International® service to send correspondence (like a personal or business letter) or other nonnegotiable documents in a letter that weighs up to 3.5 oz or large envelope that weighs under 15.994 oz.
第 2 步：Choose Your Envelope or Postcard
Envelopes are for sending paper documents like letters, cards, and forms.
明信片 用于不需要放入信封的短消息。
Just like U.S. letters, international letters must be rectangular and made of paper to qualify for letter prices. Letter envelopes for international mail can be 11-1/2" long x 6-1/8" high. （标准 10 号信封是 9-1/2 英寸长 x 4-1/8 英寸高。）您可以折叠放入信封的东西，但它需要保持平整 —— 不超过 1/4 英寸的厚度。
提示：If your letter can't fit through USPS® mail processing equipment, it’s "nonmachinable" and you’ll have to pay $0.46 more to send it. (请参阅步骤 4 中的附加邮资。) Nonmachinable items include envelopes that are lumpy or rigid, or have clasps, string, or buttons. You’ll also have to pay more if your envelopes are square or vertical (taller than they are wide).
If you want to send letter-sized correspondence without folding it, you can use a large envelope (called a 'flat"); the postage for international flats starts at $3.15. If your large envelope is nonrectangular, rigid (can't bend), or lumpy (not uniformly thick), you'll have to pay the package price.
明信片： Standard postcards are usually made of thick paper (cardstock), are between 5-1/2" to 6" long and 3-1/2" to 4-1/4" high, and are no more than 0.016" thick. Sending a regular-sized, rectangular postcard from the U.S. to another country costs the same as sending a letter.
尺寸和重量要求 – 明信片和信封
第 3 步：为您的邮件写明地址
International address formats are different for each country. You also need to write the delivery address in English (if you need to use another language, add the English translation after each line).
信封： Write your address (the "return" or "sender" address) in the top left corner (and put "USA" on the last line). Write the delivery address in the center (near the bottom). Put the destination country's name (in English) on the last line.
明信片： 明信片有不同的格式，所以请在空白处写下投递地址（在您写下信息并粘贴邮票的同一面）。
在正确位置清晰地书写您的退件地址和邮寄地址，从而确保您的邮件能够按时投递。
International Address Format Tips
- 以大写字母整洁地打印地址。
- 用钢笔或记号笔书写。
- Don’t use commas or periods.
书写寄件人地址
Write your address in the U.S. (the “return address”) in the top-left corner. 分行书写以下信息：
- 您的全名或公司名称
- 公寓或套房号
- 完整街道地址
- City, State, and ZIP+4 Code®
- USA
写下投递地址
Write the delivery address in the bottom center of the envelope.
You must write the delivery address in English, though you can include the delivery address in another language (like Russian, Greek, Arabic, Hebrew, Japanese, or Chinese), if you write the English translation after each line.
Many countries use different address formats (for example, the Postal Code might go before the city). Get specific information about other countries’ postal addresses by going to the Universal Postal Union and clicking "Postal Addressing Systems (PAS)".
Generally, include the following on separate lines:
- 收件人全名或公司名称
- 完整街道地址
- City, Subdivision (like province, state, county), and Postal Code
- 国家/地区
See more on addresses in the International Mail Manual.
Address Example (United Kingdom):
MR THOMAS CLARK
117 RUSSELL DRIVE
LONDON W1P 6HQ
《UNITED KINGDOM
注意： If you're sending mail to a U.S. territory, U.S. military base, or U.S. embassy in another country (APO/FPO/DPO mail), see How to Send a Letter or Postcard: 国内。
重要提示： When you send using First-Class Mail International, you must write "AIRMAIL/PAR AVION" on the address side of your postcard, letter, or large envelope.
When you're done addressing your envelope, put what you’re sending inside the envelope, then close and seal it.
第 4 步：计算和贴付邮资
For just 1 $1.65 First-Class Mail International Global Forever stamp, you can send a 1 oz letter or postcard to any other country in the world.
Put stamps in the upper right corner of the envelope. (For postcards, put the stamp in the space provided near the delivery address.)
If your letter is heavier or bigger, if your postcard is large or square, or if you want to add extra services, you'll need to pay more.
Postage for international letters depends on weight, size/shape, and the price group of the country that you’re sending to. (See the Country Price Groups listing.)
您可以用厨房秤，邮政秤，在自助服务亭或 Post Office™ 邮局柜台称重您的信。
提示：As a rule of thumb, you can send a 1 oz letter (4 sheets of regular printer paper and a business-sized envelope) or a postcard—to any country in the world—for 1 First-Class Mail® Global Forever stamp (currently $1.65). You can also use any other combination of stamps that adds up to $1.65.
大信封（或统一邮资信封）的 1 盎司邮资起价是 3.15 美元。
哪里可以购买邮资？
- The Postal Store
在线购买超大或超重信封的所有邮票以及附加邮资。
- Post Office™ 邮局地点
Buy stamps at Post Offices, self-service kiosks, or at National Retailers such as grocery and drug stores.
其他邮资
在线购买超大或超重信封的所有邮票以及附加邮资。
Buy stamps at Post Offices, self-service kiosks, or at National Retailers such as grocery and drug stores.
If your letter weighs over 1 oz, you can buy additional postage in the amount you need, up to 3.5 oz. (Also, you can mail a large envelope that weighs up to 15.994 oz, paying the rate for large envelopes [flats].):
- The price for each additional ounce will depend on the destination country's price group:
- Find the country in the Country Price Groups section of the Price List page, look in the "First-Class Mail Int'l" Price Group column, and get the price group number.
- Look in the First-Class Mail International Price List to see the fees for that price group.
- Or, just use the International Price Calculator.
- Nonmachinable letters that are lumpy, rigid, or rectangular, or that have clasps, string, or buttons will cost $0.46 more to send. You'll also have to pay more if your letters are square or vertical (taller than they are wide).
- 您也可以购买 1 美分，2 美分, 3 美分, 5 美分和 10 美分的 The Postal Store® 的邮票。
- 说明：If your large envelope (flat) is lumpy, rigid, or nonrectangular, you’ll have to pay the package price.
提示：Put the stamp on last; that way, if you make a mistake at any other point, you won’t waste a stamp.
Calculate International Postage
额外服务
如果您需要保险、递送证明、签收服务或其他可选服务，则必须支付额外费用。Note that not all extra services are available for all products; our International Insurance & Extra Services page has more details.
When you go to the Post Office to mail First-Class Mail International letters, some of the more common extra services that you can add include:
- Registered Mail®：Requires that the recipient sign for the mail to confirm delivery (or attempted delivery). Registered items are handled separately and securely while in the U.S.—destination country procedures may vary. The office of mailing will keep a mailing receipt, and the office of destination will keep a record of delivery.
- 退回收据：Available as an add-on when you use Registered Mail service to send a First-Class Mail International item. When you mail the item from a Post Office, a card is attached. When the item is delivered (or delivery is attempted), the card is signed and sent to you as a delivery record. (Note that some countries may not require a recipient signature.)
- Certificate of Mailing: Proof that you mailed something from a Post Office location.
A Note on Tracking: You can’t get tracking on First-Class Mail International letters. You can use Registered Mail service with Return Receipt, or use a USPS international package shipping service that offers tracking.
提示：If you’re sending large envelopes (flats) using Priority Mail® International, Priority Mail Express® International, or First-Class Package International Service®, you can use Click-N-Ship® service to pay for and print your own postage online.
第 5 步：邮寄您的邮件
Once your envelope or postcard has the correct addresses and postage, you can send it several ways, including putting it in your mailbox or dropping it in a blue collection box or at a Post Office location.
- 把您的信放在邮箱里并举起旗帜（如果有的话）。
- 如果您有信箱集群，请将其放入外发邮件槽中。
- 将信件或明信片放入一个蓝色收集箱中。
- 将箱子带到 Post Office®（邮局）大厅进行投递。
重要提示： 如果您的信封有邮资邮票，并且重量超过 10 盎司或厚于 1/2 英寸，您不能把它放在 Collection Box (收件邮箱)里；您必须将其交给 Post Office 邮局所在的的员工。See more details on What Can and Cannot be Deposited in a Collection Box®? (Also see specific guidance around dropping off mail that requires customs forms—though if you’re sending mail under 15.994 oz that’s just documents, you don’t need to do a customs form.)