Advertising on CHAOA
Identity verification
The more you want from CHAOA, the higher the verification required. CHAOA never stores the document image — only the result of the check.
UnverifiedUnlocks: Browse, search, saveHow it works: You can browse everything but cannot post yet.This level grants free listings: 0
Email verifiedUnlocks: Account, saved searches, messaging sellersHow it works: A link to your mailbox, or sign-in with Google or Apple. Disposable mailboxes are refused, and variants of one address count as one.This level grants free listings: 0
Document declaredUnlocks: Post listings, each one reviewedHow it works: Enter your CCCD or passport number. CHAOA checks the shape of the number, keeps an irreversible fingerprint and stores no image. The free allowance belongs to the document, not to the mailbox.This level grants free listings: 2
ID verifiedUnlocks: Post listings, trust badge, reviewsHow it works: VNeID for Vietnamese citizens, passport eKYC for foreigners. CHAOA receives the result only and never stores the document image.This level grants free listings: 5
Verified businessUnlocks: Unlimited listings, storefront, advertisingHow it works: Tax code and business registration. Required once you sell at volume.This level grants free listings: 5
Since 1 July 2026, e-commerce law 122/2025/QH15 requires platforms to verify their sellers. CHAOA does it from day one.
CHAOA stores: level, method, an irreversible document fingerprint, issuing country, date. It stores neither the document image nor its number.
Free allowances
5active listings free of charge across all sections.
2 · VehiclesOne or two of your own is normal. The third means a shop, and a shop pays.
2 · PropertyOne or two of your own is normal. The third means a shop, and a shop pays.
150.000 ₫per listing beyond the allowance, 30 days.
Payments are not enabled yet — posting is still free for now.
Placement rules
Ads are always labelled and never push down organic results: at most two paid slots in the recommendation block.
Bump upThe listing returns to the top of the feed as if just posted.5.000 ₫ / each
Daily bumpEvery morning the listing rises to the top as if just posted. Others keep posting; yours stays above.90.000 ₫ / 30 days
HighlightA coloured border and label in the list — the eye catches it at once.30.000 ₫ / 7 days
Pin to categoryThe first three slots in the category for your city.120.000 ₫ / 7 days
Recommended under similarWhoever is looking at someone else's scooter sees yours in the block below.60.000 ₫ / 7 days
BannerThe right-hand column on desktop, one slot per page; never shown on phones.200.000 ₫ / 1,000 impressions
Storefront · LiteYour own page with your logo and colour, unlimited listings. Similar items from others still show under your product.490.000 ₫ / per month
Storefront · ProEverything in Lite, and under each of your items only your own shop's products appear, not competitors'.1.490.000 ₫ / per month