Tax ID Guide - Format & Restrictions

In this article, we consolidate all information regarding Tax IDs to save you time researching. 

We'll Cover:

What is a Tax ID?

A Tax ID in shipping is a general term used to describe a combination of numbers that identify specific citizens in countries that require identification for screening purposes at customs. There may be variations in phrasing depending on the destination country. In some Asian countries, the number is specifically referred to as a TIN (China, Taiwan, South Korea). In Brazil, on the other hand, the tax ID is referred to as a CPF number.

Couriers shipping to certain countries may require a customer's Tax ID to be provided upon shipment creation to ensure smooth customs clearance. Failure to provide a Tax ID for certain countries may lead to issues at customs resulting in return or abandonment. 

Current Restrictions 

In the spreadsheet below, you will find countries and courier Tax ID policies that will help guide your international shipping strategy on Easyship. 


Required: Shipment cannot be generated on Easyship without a Tax ID entered


Suggested: The user will be notified that a Tax ID is suggested to avoid any issues at checkout


Tax ID Format

The countries affected by this are as follows; Brazil, Chile, China, Indonesia, South Korea, and Taiwan.


Can contain any character within A-Z or 0-9 (temp regex)

CPF – Individual Tax ID (format: 000.000.000-00)

CNPJ – Business Tax ID (format: 00.000.000/0000-00)

Passport Number



Can contain any character within A-Z or 0-9 (temp regex)

Chilean VAT number contains 7 or 8 digits, dash, and one check number (e.g., 01.234.567-8).

What’s an example of a RUT / RUN?

RUT / RUN numbers have eight digits, plus a verification digit, and are generally written in this format: xxxxxxxx-z. Z can be a digit or the letter K, and it’s determined by an algorithm that’s performed on the first eight digits, ensuring that typing mistakes when entering a RUT or RUN number will result in an invalid number. Some examples of Chilean RUT / RUN numbers are:





Exactly 15 digits within 0-9

Exactly 18 digits within 0-9

For entities, it consists of 15 characters (old TIN regime) or 18 characters (new TIN regime). For an individual using a Chinese ID card as its identification, TIN is its ID number which consists of 18 characters.



Can contain any character within A-Z or 0-9 (temp regex)

Indonesia Tax ID Format

NPWP is comprised of 15 (fifteen) numeric digits with the following details:

A. the first 9 (nine) digits (1-9) are unique identity of the taxpayer;

B. the next 3 (three) digits (10-12) are the code for tax office where the taxpayer registered for the first time;

C. the last 3 (three) digits (13-15) are code for central or branch status.


The Indonesian tax ID number or NPWP (Nomor Pokok Wajib Pajak) is now mandatory for import and export shipments.
This is mandatory for all transactions and parcel types except documents.

For businesses, companies in Indonesia must provide the Indonesian Tax ID Number or NPWP when importing or exporting shipments.

For personal shipments, customers must provide any one of the following documents:

  • Indonesian ID Number (NIK - Nomor Induk Kependudukan) for Indonesian Nationals

  • Indonesian Driver’s License, for Indonesian Nationals or Foreigners

  • Passport Number, only for Foreigners

Type of Driver’s License: from Type A to D

A) A + 13 digits
B1,B2) B + 12 digits
C) C + 12 digits
D) unknown

Who is required to register for the NPWP tax number and file income tax returns?

Employed individuals, Individual taxpayers, Expats who stay or present in Indonesia for more than 183 days within a single period of 12 months

More information on NPWP registration for individuals is available on the following link: >

South Korea

Can contain any character within A-Z or 0-9 (temp regex)

  • Business Registration Number A Business Registration Number consists of 10 digits (XXX-XX-XXXXX)

  • A Resident Registration Number consists of 13 digits (XXXXXX-XXXXXXX) and is assigned based on the following criteria


The first digit is within A-Z, and following with exact 9 digits within 0-9

National ID Card Number A ten-digit code with the first an alphabetic letter followed by a nine-digit numeric string.

The alphabetic letter is the area code of the municipality/county/city in which the individual applies for household registration.

The leading number represents gender: “1” for males and “2” for females. The last number is a check digit.

2 2. ID Number A ten-digit code with two alphabetic letters followed by an eight-digit numeric string. The first alphabetic letter is the area code of the municipality/county/city by which the ID Number was issued. The second alphabetic letter represents gender: “A” or “C” for males, and “B” or “D” for females.

The last number is a check digit. 3. Tax Code (1) For individuals of Mainland China area: a seven-digit code that begins with 9 followed by the last two numbers of the individuals’ birth year and the four numbers of the individuals’ birth month and day (mm/dd). (2) For individuals other than the ones indicated in (1): a ten-digit code that begins with the individual's date of birth (yyyy/mm/dd), followed by the first two alphabetic letters of the individuals’ name on the passport. 4. BAN An eight-digit code that consists of numbers.


(一)具身分證字號者為身分證字號 (10碼,由內政部戶政司編配) 。

(二)具統一證號者為統一證號 (10碼,由內政部移民署編配)。

(三)個人無身分證字號或統一證號者,以現行稅籍編號方式編配:大陸地區人民為9+西元出生年後2碼及出生月日各2碼;其餘情形為西元出生年月日8碼+英文姓名前2字母2碼。例:ROBERTW.DAVISON 出生日期JULY,12,1942 ,稅籍編號則為「19420712RO」。

二、非個人:統一編號 (8碼,由公司、商業登記主管機關或稅籍登記所轄稅捐稽徵機關編配)。


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