Used motorbike buyers lose deposits to fake Facebook sellers or wait months for the book transfer
A buyer lured by a 2019 Yamaha R3 at about 40,000 baht on a Facebook page lost around 16,000 baht over three transfers as the seller changed the bank account and refused a video of the bike. Another paid 20,000 baht and two months later still had no registration transfer or plates, with the seller offering a buyback minus 4,500 baht.
Is this you?
If you run into this every week, tell us. Teams only build for challenges with someone waiting for the tool.
0ready to build
Next build day
5 ways to tackle it
Camera and vision
Doc Checker: do the papers match the bike
The buyer photographs the registration book and the bike's chassis and engine numbers. Claude vision reads both and flags mismatches before any money moves.
Build with Claude vision, OCR, PWA
iPhone and Android app
Live Proof Call: seller shows the bike with a code
The app starts a video call where the seller reads a one time code beside the bike. The clip is stamped and saved for the buyer, which a fake seller refusing a video can't produce.
Build with WebRTC, Next.js, one-time code, timestamped storage
Web portal
Safe Deal Pack: print a two-copy bill of sale with a transfer deadline
A page generates a bill of sale with a transfer deadline, a refund clause and a document checklist for both sides, printed in two copies with space for ID and thumbprint. Both sign at the handover, so the paper trail exists before the money does.
Build with Next.js, Claude, PDF generator, printer
AI agent
Seller Sleuth: paste the page and the agent checks photos, page age and account name
Paste a seller's page and bank account. The agent reverse-searches the bike photos, checks how old the page is, and compares the account name with the name on the page. A seller who changed the bank account mid-deal gets flagged.
Build with Claude, reverse image search API, Facebook public page info, Thai bank name check
Voice and phone
Chase Call: an agent phones the seller on day 7, 14 and 21 about the book transfer
After payment, the agent phones the seller in polite Thai and asks where the registration transfer stands, recording the answer with a timestamp. The dated calls become proof for the buyer if the seller offers a buyback minus 4,500 baht.
Build with Twilio Voice, Gemini Live or OpenAI Realtime, Thai TTS, Claude
What people reported
Buyer lured by a 2019 Yamaha R3 at about 40,000 baht on a Facebook page lost about 16,000 baht over three transfers; seller changed bank accounts, refused a video, sent photos of papers instead.
pantip.comBuyer paid 20,000 baht for a used motorbike, two months later the registration book transfer was incomplete, no plates or documents, seller offered a buyback minus 4,500 baht.
pantip.com