The SUDCAN standard

A new standard for documenting Canadian lineage.

Bill C-3 created a need that didn't quite exist before — a structured way to assemble, validate, and exchange genealogical evidence specifically for Canadian citizenship by descent. SUDCAN is our answer: a proprietary file format for capturing a lineage chain, the evidence behind it, and its readiness for submission.

What it captures

A complete chain from applicant to Canadian ancestor; per-person evidence (birth, marriage, naturalization, military service, residency); hygiene flags for gaps and conflicts; and a readiness state that says exactly what's submission-ready and what isn't.

Why it exists

Genealogy software wasn't built for citizenship-by-descent submissions. Bill C-3 applicants juggle ten to thirty source documents per lineage — SUDCAN gives them one file they can share with family, hand to a lawyer, or one day open in an IRCC tool.

Designed to be portable

SUDCAN is a proprietary format, but the spec is publishable. Family members, lawyers, and (in the future) IRCC officers should be able to read these files without needing our software. Your data should always be yours.

Three formats, one model — plus GEDCOM for interop

  • SUDCAN Base lineage file: chain + per-person fields
    .sudcan
  • SUDCAN+ Extended: evidence references, hygiene state, coverage data
    .sudcanp
  • SUDCAN PAK Sealed submission package — lineage + all source documents in one file
    .scpak
  • GEDCOM export Open genealogy standard for use with third-party family-history apps
    .ged

Every Suddenly Canadian and SUDCAN Studio edition reads and writes the full SUDCAN family. You decide where your files live and who sees them.

Want to work with SUDCAN files on the desktop?

SUDCAN Studio ships in four editions for individuals, families, immigration professionals, and IRCC officers — every edition reads and writes the full file family.

Explore SUDCAN Studio → Back to home