Is 'AD' still required in subject lines for emails sent in China?

Summary

While not explicitly mandated by law, using 'AD' in the subject line of marketing emails sent to China remains a common practice and is generally considered a best practice for ensuring transparency and complying with Chinese advertising regulations. Although the specific regulations emphasize clear identification of advertisements, the exact method, such as using 'AD', is not always strictly defined. Consulting with local counsel or experts on current advertising regulations related to email marketing is essential for legal compliance and optimal deliverability.

Key findings

  • Continuing Practice: Including 'AD' in subject lines remains a widespread practice in email marketing to China.
  • Transparency Focus: Chinese advertising regulations prioritize the clear identification of marketing content.
  • Legal Ambiguity: Whether 'AD' is a strict legal requirement is unclear; compliance may depend on interpretation.
  • Deliverability Impact: Compliance and transparency can impact email deliverability and sender reputation.

Key considerations

  • Local Expertise: Consulting with local legal counsel or experts is essential due to potentially evolving and variably interpreted regulations.
  • Best Practice Approach: Even if not strictly required, using 'AD' may be prudent as a best practice to avoid issues with compliance.
  • Dynamic Regulations: Advertising regulations in China can change, requiring ongoing monitoring and adaptation.

What email marketers say
9Marketer opinions

Multiple sources indicate that the requirement to include 'AD' in the subject line of marketing emails sent to China persists, although its strict enforcement and legal mandate may vary. While not always explicitly required by law, many consider it a best practice for transparency and compliance with Chinese advertising regulations, which emphasize clear identification of commercial content. Due to potentially evolving regulations, consulting local legal counsel is recommended for the most up-to-date guidance.

Key opinions

  • Persistence of 'AD': The practice of including 'AD' in the subject line is still common for marketing emails sent to China.
  • Legal Mandate Uncertainty: Whether 'AD' is a strict legal requirement is unclear, but it aligns with regulations requiring clear identification of advertisements.
  • Transparency: Using 'AD' ensures transparency, fulfilling the general requirement for advertisements to be easily identifiable as such.
  • Deliverability Considerations: Using 'AD' could help with deliverability as it is a common method used by ISPs for filtering.

Key considerations

  • Evolving Regulations: Chinese advertising regulations are subject to change, necessitating ongoing monitoring.
  • Local Expertise: Consulting local legal counsel is recommended to ensure compliance with the most current regulations.
  • Best Practice vs. Legal Requirement: Even if not strictly mandated, including 'AD' might still be considered a best practice for maintaining good sender reputation and compliance.
Marketer view

Email marketer from Quora shared in a thread that including 'AD' is generally still considered a best practice, if not a strict legal requirement, to ensure compliance with local regulations.

March 2025 - Quora
Marketer view

Marketer from Email Geeks confirms that adding "AD" in the subject line is still a requirement in China, despite its ineffectiveness in stopping spam. He explains that it was initially intended to help ISPs filter emails, assuming spammers would comply and legitimate emails wouldn't use it.

November 2021 - Email Geeks
Marketer view

Email marketer from Dragon Social explains that placing '[AD]' at the beginning of the subject line is a common practice, and might still be required. They recommend checking the current regulations.

March 2022 - Dragon Social
Marketer view

Email marketer from China Marketing Insights states that under the Advertising Law of the People's Republic of China, it is required that all advertisements are clearly identifiable as such and that this often translates to including 'AD' in the subject line of marketing emails.

February 2022 - China Marketing Insights
Marketer view

Email marketer from Reddit user u/EmailExpert suggests asking a local expert due to ever changing requirements, but mentions 'AD' is a good start to keep your domain in good standing.

February 2025 - Reddit
Marketer view

Marketer from Email Geeks states that the "AD" requirement in subject lines in China is believed to be required by law.

July 2021 - Email Geeks
Marketer view

Email marketer from ActiveCampaign advises to always check and comply with current advertising regulations when sending email marketing to China. Including an 'AD' tag is a common practice and may be necessary.

January 2022 - ActiveCampaign
Marketer view

Email marketer from Mailjet shares that, according to regulations in China, emails containing promotional material must be clearly identified as advertising. This is generally accomplished by adding the abbreviation "AD" at the beginning of the email subject line, making it clear to recipients that the email is an advertisement.

October 2022 - Mailjet
Marketer view

Email marketer from Digital Marketing Asia warns that Chinese regulations around email marketing necessitate transparency, and using 'AD' in subject lines is an easy way to fulfill that requirement, though marketers must stay updated on specific interpretations.

January 2025 - Digital Marketing Asia

What the experts say
1Expert opinion

An expert from Word to the Wise emphasizes the importance of consulting with local counsel or experts regarding current advertising regulations when sending email marketing internationally, particularly to China. While the explicit requirement of an 'AD' tag might vary, transparency and compliance with local laws are crucial for both deliverability and legal adherence.

Key opinions

  • Local Counsel is Key: Consulting with local legal counsel or experts is vital for understanding current regulations.
  • Transparency Matters: Transparency in email marketing is crucial, irrespective of specific tag requirements.
  • Compliance Impacts Deliverability: Adherence to local laws directly affects email deliverability and legal standing.

Key considerations

  • Varying Requirements: The specific need for an 'AD' tag may vary; hence, local expertise is necessary.
  • Global Implications: The advice applies to email marketing internationally, not just China.
Expert view

Expert from Word to the Wise explains that for email marketing to China (and elsewhere internationally), it is vital to consult with local counsel or experts on current advertising regulations as they relate to email. Whether the 'AD' tag is explicitly required or not, transparency and adherence to local laws are critical for deliverability and legal compliance.

February 2024 - Word to the Wise

What the documentation says
4Technical articles

Several documentation sources highlight that while Chinese advertising law requires marketing materials to be clearly identifiable as such, it doesn't explicitly mandate the use of 'AD' in subject lines. The focus is on transparency and clear identification of commercial content. Consulting legal counsel is recommended to ensure compliance with specific labeling requirements.

Key findings

  • Transparency is Key: Chinese advertising law emphasizes clear identification of advertisements.
  • 'AD' Not Explicitly Mandated: The use of 'AD' in subject lines is not explicitly required by law.
  • Identification Required: Marketing content must be identifiable as advertising.

Key considerations

  • Legal Consultation: Consulting legal counsel is recommended to ensure compliance.
  • Vague Requirements: The exact method for identifying advertising is not always strictly defined, requiring careful consideration.
Technical article

Documentation from China Law Blog describes the general principles of advertising law emphasizing truthfulness and clarity; it suggests advertisers consult legal counsel to ensure compliance regarding labeling requirements like 'AD'.

June 2021 - China Law Blog
Technical article

Documentation from the U.S. Commercial Service explains that according to China's advertising laws, marketing materials should be clearly identified as advertising. While the exact method (like using "AD") isn't always strictly defined, transparency is essential.

August 2024 - Trade.gov
Technical article

Documentation from MessageBird shares that while primarily focused on SMS marketing, MessageBird stresses the importance of adhering to local advertising regulations in China, which often require clear identification of commercial messages.

June 2024 - MessageBird
Technical article

Documentation from Sinorbis.com clarifies that according to the Advertising Law of the People's Republic of China, all advertisements must be clearly identifiable as such. Although not explicitly mandating 'AD' in the subject line, it necessitates that marketing content is identifiable as advertising.

December 2021 - Sinorbis.com