"Must-buy before entering" products for foreigners: mandatory car insurance for certain countries, visa services, onward / connecting flight proof, arrival eSIMs. One-time fee $10–600, SEO captures search demand.

Evidence (indie, revenue verified by payment platforms, 30 days, as of 11-06):

• Georgian APPA (georgianappa.com, founded 2024-11): sells local mandatory car insurance to foreigners driving into Georgia ($20 / 15 days, $30 / month, $150 / year) and travel insurance (from $3.62 a day). $5,252 in 30 days (+107% week over week), and today's threshold list reads "30 days, revenue crosses $5k for the first time"; channels are SEO, Facebook, Instagram, Google Ads.
• Safeonward (safeonward.com, founded 2026-06): sells "return flight proof" for visa applications, from €9.90. $4,582 over 30 days (+66%).
• Get Brazil Visa (getbrazilvisa.com, founded 2025-12): an application tool for Brazil digital nomad, retirement and family visas, $599,30 one-time, $4,564 (+49%), driven by SEO and content.
• Snap2Pass (passport photos) $5,189 (−24%); an anonymous "travel essentials" platform $120,709 (−2.6%, much larger, and I can't see what it sells).
• The same audience's eSIM space is already crowded: Redsim $4,041 (+154%), eSIMPal $3,403 (−36%), Voyasim and Viasimo at $1.3–1.5k each. Airalo is running 1,703 ads on Meta (11-02).

Small, one-time items foreigners must buy when entering a country but don't know where to get. Buyers pay once, so no retention is needed. They pay because official channels are hard to find or only in the local language, and whoever shows up first in search results gets the sale.

• Copy by country: other countries requiring foreign vehicles to buy local mandatory insurance (Caucasus, Balkans, Central Asian overland routes), or countries with e-visas / arrival cards where the official site is hard to use ("fill it in for you + reminders" for each country's ETA / e-Visa).
• Copy by audience: digital nomad visas (apply the Get Brazil Visa approach to Portugal, Spain, Indonesia, Thailand DTV).
• Change the format: visa / entry requirement lookups as an app or Chrome extension (prompting you what documents you need while booking flights).

Compliance and trust. Selling insurance needs a licensed local company behind it (Georgian APPA is likely an agent). Visa services in some countries get flagged as impersonating official sites, and search ad policies restrict them too. The eSIM segment is already locked up by paid acquisition from companies like Airalo; I wouldn't enter it.

Individual developers who know a country's procedures and can do SEO; one-time fees, no subscriptions; English plus the destination's language.

No, but "small one-time necessities forced by policy" is a pattern you can keep finding, same logic as [015][064] regulatory deadlines.