Prior to assigning subscriber numbers to subscribers for use, telecommunications enterprises allocated with subscriber numbers should verify and register the subscriber information.
The subscriber information stated in the preceding paragraph refers to:
1. When the subscriber is a natural person:
（1）Subscribers who are citizens of the R.O.C. must provide either the original copies of their National Identification Card and passport, or the original copy of either the National Identification Card or passport, supplemented by other original identity certification documents that suffices to identify the individual.
（2）Subscribers who are foreign nationals must provide either the original copies of their passport and valid Alien Resident Certificate, or the original copy of either the passport or valid Alien Resident Certificate, supplemented by other original identity certification documents.
2. Subscribers who are legal persons, unincorporate associations, firms or government agencies（organizations）must provide their certification documents and the original copies of their representative’s respective National Identification Card, passport or valid Alien Resident Certificate.
When a subscriber commissions an agent to apply to telecommunications enterprises allocated with subscriber numbers for the assignment of subscriber numbers, the telecommunications enterprises allocated with subscriber numbers must verify and register the agent’s information. The agent should provide the subscriber information prescribed in the preceding paragraph, as well as the agent’s National Identification Card, along with the subscriber’s agent authorization documents.
The application of subscribers that are unable to provide a National Identification Card or passport to meet the requirement of presenting two forms of identification as prescribed in Paragraph 2 shall be handled depending on the alternative forms of identification in accordance with other laws and regulations.
The verification prescribed in Paragraph 1 may be conducted by signing a digital signature as prescribed under the Electronic Signatures Act and uploading the information specified in Paragraph 2.

Where the subscribers mentioned in the preceding article are corporate customers, telecommunications enterprises allocated with subscriber numbers should not only follow the provisions of the preceding article but also require corporate customers to provide the following information:
1. Purposes of use;
2. Place of business;
3. List of users;
4. Affidavit wherein the subscriber guarantees not to use the subscriber number or service in violation of regulations, and not to transfer the subscriber number to others without the consent of the telecommunications enterprise.
Telecommunications enterprises allocated subscriber numbers should register the information outlined in Subparagraphs 1, 2, and 4 of the preceding paragraphs, and incorporate the information from Subparagraph 3 into the sampling plan stated in Paragraph 1 of Article 16.

When verifying subscriber information, telecommunications enterprises allocated with subscriber numbers shall confirm compliance with the identification possessed by their subscribers or agents.
When verifying the information of subscribers applying for a subscriber number, telecommunications enterprises allocated with subscriber numbers shall complete the verification either at the counter or through on-site visits with the subscribers or their agents. Verification through the internet or methods other than in-person at the counter shall not be permitted, except as provided in Paragraph 5 of Article 3 or approved by the competent authority.
When processing subscriber number applications from corporate customers, telecommunications enterprises allocated with subscriber numbers shall, whenever necessary, conduct on-site visits to verify their business operations and the purposes for applying for subscriber numbers or services.
Telecommunications enterprises allocated with subscriber numbers must not activate subscriber numbers overseas without the consent of the competent authority.

When verifying the identity of subscribers applying for subscriber numbers for the first time, telecommunications enterprises allocated with subscriber numbers shall retain the image files of the subscribers or their agents.

To achieve the purposes of verifying subscriber information as prescribed in Articles 3 and 5, and adopting appropriate risk control measures as prescribed in Article 15, the telecommunications enterprises allocated with subscriber numbers shall conduct verification with assistance of the database designated by the competent authority.
Telecommunications enterprises allocated with subscriber numbers shall ensure that the collection, processing and use of information from the database mentioned in the preceding paragraph comply with the Personal Data Protection Act and shall not exceed the necessary scope of purposes of verification. They shall ensure that their employees abide by confidentiality obligations.
The database mentioned in Paragraph 1 shall be designated by the competent authority after coordination with relevant authorities.

The information registered by telecommunications enterprises allocated with subscriber numbers in accordance with the Regulations shall be retained for at least one year after the termination of the service contract.
Where the information stated in the preceding paragraph is related to criminal investigations, litigation, or the necessity for preserving evidence, the information retention period shall be extended upon notification from the court, prosecutor's office, or judicial or police authorities.

Telecommunications enterprises allocated with subscriber numbers may commission their distributors, telecommunications service number agents or other individuals to implement the verification and registration of subscriber information specified in the Regulations. The commissioned agency shall, within the scope of the commission, be regarded as the telecommunications enterprise.
Telecommunications enterprises allocated with subscriber numbers shall supervise the preceding commissioned agency in commissioning tasks in an appropriate manner.