What is PP20 (VAT registration certificate)?

PP20 is the VAT registration certificate the Revenue Department issues once a business's VAT registration application (form PP01) is submitted and approved. This certificate is legal proof that a business is properly registered for value-added tax. Businesses must display the PP20 certificate in a visible spot at every place of business, so customers or officials can check it on the spot. Businesses with multiple branches need a separate PP20 for each branch. Applying for PP20 starts with filing form PP01 along with supporting documents: an ID card, house registration, a company or partnership certificate for juristic entities, a map of the business location, and a lease agreement or proof of ownership for the premises. File at the area Revenue Office covering the business location, or online through the Revenue Department's system. Processing generally takes around 45-60 days from the filing date, though the actual timeline varies by office, so check progress with the area Revenue Office handling the application. For online sellers, the point to watch is that once sales income passes 1.8 million baht a year, the law requires VAT registration within 30 days of crossing that threshold, not waiting until year-end. Once form PP01 is filed and approved, the PP20 certificate follows as proof. Sellers on Shopee, Lazada, or TikTok Shop should track cumulative annual sales consistently, since income across multiple platforms counts toward the same total. Thresholds and procedures can change, so check the latest information at rd.go.th before proceeding.