Start with the official source
We capture the rules directly from immigration authorities, embassies and government publications. Each fact links to its official source.
Two independent readings
Codex and Claude independently extract the same fields from the same official sources. They work separately so that one reading cannot influence the other.
The quotation must match
Code checks every quotation against the captured source and compares values, currencies, units and conditions. A separate adjudication checks disagreements. Only facts that pass the evidence gate appear on the site.
Check the date
Each fact keeps its original verification date and source quotation. Updated rules must pass the evidence pipeline again before they appear.
Corrections keep an evidence trail
Changes are recorded with their sources. Automatic checks withdraw facts whose evidence no longer passes; administrators can also remove a disputed value.
Who maintains this reference
whvisas is maintained by Facundo at Toptive. For source corrections, contact hola@whvisas.com.