What Is a Company Affidavit? Why Chiang Mai Business Owners Need One

A company affidavit (DBD company certificate) is an important document issued by the Department of Business Development (DBD) to confirm the legal status of a company or partnership: that it is properly registered, how many directors have signing authority, and what its business objectives are. For business owners in Chiang Mai, having this document ready is key to completing transactions smoothly. The Chiang Mai accounting team at YMTD recommends checking this document regularly to keep it as up to date as possible

Why a Correct Company Affidavit Matters to Your Business

In the digital era of 2026, doing business depends on credibility and speed. If you want to expand your customer base or work with new partners, the company affidavit is like the company's "ID card", used to prove its identity. Its importance lies in the following:

  • Opening a bank account: Every bank in Chiang Mai requires a current affidavit to verify the company's status
  • Tax transactions: Whether claiming a tax refund or dealing with the Revenue Department
  • Bidding for work: Government agencies and large private companies usually require an affidavit issued within the last 3 or 6 months
  • Signing contracts: To confirm that the person signing the contract is a director with genuine authority to act

If these documents worry you, looking for a professional, accessible accounting service in Chiang Mai will make your Chiang Mai business more agile and greatly reduce its legal risk

Steps to Request a Company Affidavit Online in 2026

Today the DBD has developed a very convenient online channel. Business owners can do it themselves through the e-Service system, as follows:

Step 1: Go to the DBD Website

Go to the DBD e-Service website and select the option to request a certified copy of the company affidavit. Have your 13-digit juristic person registration number ready

Step 2: Register and Verify Your Identity

If you have never used the system, register with the digital identity verification system (Digital ID) or register as a system user, for the security of your company's data

Step 3: Choose the Affidavit Format

Choose the format you want, such as an electronic file (e-Certificate) with a certified digital signature, or a paper copy sent by post. In 2026 the e-Certificate system is the most popular because it saves time and travel costs

Step 4: Pay the Fee and Download

Pay the fee online (QR Payment). When complete, you receive a PDF file that can be submitted to any agency immediately

Common Mistakes When Requesting a Company Affidavit

Although the steps look simple, there are several points where business owners often slip up and waste time unnecessarily:

  1. Forgetting to keep details up to date: Often a change of directors or company address has been made but not notified to the DBD, so the details in the affidavit do not match reality
  2. Expired file: Most agencies require a document no older than 3-6 months. Using an old copy may get it rejected
  3. Forgetting to check the digital signature: If you receive the file but do not verify that the e-Certificate file is complete, you may have problems submitting it electronically to some agencies

To make sure your business documents are always correct and current, consulting an accounting firm in Chiang Mai such as YMTD is a worthwhile aid, because we look after both your tax work and your registration work and give proactive advice to prevent future problems

Conclusion

Requesting a company affidavit in 2026 is no longer difficult, thanks to an online system accessible anywhere, any time. Nevertheless, care in checking that the details are correct is what matters most, so that your business runs as smoothly and professionally as possible. If you want a professional assistant who understands the business context in Chiang Mai and is ready to support you at every step of your accounting and tax

Contact YMTD Accounting Partner, Chiang Mai for advice from a team of experts who will help your business grow steadily, with full-service accounting

Tel: 081-542-3019
LINE: @ymtd