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Brand Ambassador
October 20, 2026 A brand ambassador is a person a company picks to represent its brand over a long period, appearing in its ads, at its events and on its social media under a fixed-term contract. An ambassador can be a celebrity, a KOL (key opinion leader), an employee or a loyal customer.
What is a brand ambassador?
Hiring a KOL for a single post is a different arrangement. An ambassador contract usually runs for several months, includes category exclusivity (no ads for competitors) and requires the ambassador to use the product outside paid posts as well.
Ambassador vs. KOL vs. KOC vs. affiliate
| Role | Duration | Exclusivity | Used to |
|---|---|---|---|
| Brand ambassador | Long term | Usually | Tie a face to the brand and build awareness |
| KOL (key opinion leader) | Per campaign | Rarely | Push a message quickly to a large following |
| KOC (key opinion consumer) | Per post or per wave | No | Review products as a real buyer and drive conversions |
| Affiliate | Ongoing, paid per order | No | Sell through links for a commission |
One person can play more than one role. Sơn Tùng M-TP, a Vietnamese pop star, was an ambassador for GoCar Protect, while the food delivery app BAEMIN chose a group of green-lifestyle KOLs for its “Thử chút Healthy” (“Try a little healthy”) campaign.
Vietnam’s amended Advertising Law: what ambassadors and KOLs must do
Law No. 75/2025/QH15, which amends Vietnam’s Advertising Law, was passed on June 16, 2025 and took effect on January 1, 2026 (Vietnam Government Official Gazette, June 2025). The law adds the concept of an “advertising product conveyor”: a person who directly advertises, recommends or endorses a product online, or by wearing or using it, for profit. Ambassadors belong to this group.
The new Article 15a says that influencers, as defined under consumer protection law, must do the following when they advertise:
- Verify the credibility of the advertiser and check the documents about the product.
- Not promote products they have not used or do not fully understand.
- Disclose that the content is an ad right before and during the ad.
Brands have their part too. Clause 1 of Article 15a gives the ambassador the right to receive truthful, complete information about the product and the related documents.
Checklist before you sign an ambassador contract
- Check whether the ambassador’s followers match your target customers (age, region). Follower count alone tells you little.
- Review what they have said in public and which brands they have represented before.
- Send the product for the ambassador to use first, and keep evidence: the ship date, photos, trial videos.
- Hand over the product declaration, quality certificates and documents that back up every benefit claimed in the ad.
- Agree on how ads will be labeled in videos, livestreams and captions.
- Add a morals clause giving you the right to terminate and claim compensation if the ambassador is caught up in a scandal.
- Set the metrics: branded search volume and sales from the ambassador’s own discount code.
Frequently asked questions
Can employees be brand ambassadors?
Yes, especially for B2B products or recruiting, where people who work in the field are more believable than celebrities. Paid posts should be clearly labeled as ads.
Can the brand run ads using the ambassador’s videos?
Yes, if the contract allows it. On TikTok, the ambassador generates an authorization code in the video’s ad settings so the brand can run Spark Ads from that same post (TikTok Business Help Center, October 2026). Write the authorization period into the contract.
How is an ambassador different from the brand’s visual identity?
A mascot, logo and colors are part of brand identity. The company owns them, and they do not depend on one person’s reputation. An ambassador contract comes with an end date.
If you need an ambassador who fits your brand strategy, or want the candidate’s profile and the ad plan reviewed before the contract is signed, contact Adtek to talk it through.
