CRS/FATCA self-certification: when evidence mode is enough and filing mode is not

CRS and FATCA do not apply in the same way to every professional office. Filing obligations sit with Reporting Financial Institutions and related reporting roles; many advisors only need evidence-support workflows for client tax-residency information.

The key operational distinction is scope. If the organization is not a Reporting FI, it should not pretend to prepare official returns. If it is in scope, it needs financial accounts, parties, self-certifications, reasonableness checks, due diligence reviews, blockers and export evidence.

A good system therefore makes filing mode explicit and keeps evidence-only mode honest for ordinary advisory offices.

Who this applies to

This guide is for organizations collecting tax-residency evidence or operating as, or for, a Reporting Financial Institution.

• Reporting Financial Institutions
• Sponsoring entities and trustee-documented trusts
• Advisors collecting client tax-residency evidence
• Teams preparing annual CRS/FATCA returns
• Offices handling self-certification gaps

Legal and supervisory context

CRS and FATCA reporting are highly structured. Belgian reporting relies on official guidance, business rules, identifiers, XML formats and acknowledgement evidence.

For ordinary advisory offices, the key is not to overclaim filing capability. Evidence mode can still be valuable: collect self-certifications, flag missing or inconsistent tax residence data and keep workpapers.

What the office must actually do

The office should turn the obligation into a repeatable workflow with named owners, deadlines, evidence and reviewable decisions.

• Set AEOI scope.
• Record Reporting FI profile where in filing mode.
• Create accounts and parties.
• Collect individual, entity and controlling-person self-certifications.
• Run reasonableness checks.
• Prepare returns only where the organization is in scope.

What good evidence looks like

The file should show scope, self-certification evidence, due-diligence review, blockers, export status and any portal acknowledgement.

Common mistakes supervisors find

• Preparing returns for organizations that are not Reporting FIs.
• Ignoring passive NFE controlling-person logic.
• Accepting inconsistent self-certifications without review.
• Missing GIIN, TIN or identifier requirements.

Practical checklist

• Decide scope.
• Collect FI profile.
• Add accounts and parties.
• Request self-certifications.
• Run reasonableness review.
• Open cure where incomplete.
• Prepare export or evidence memo.

FAQ

Official references

• OECD — amended CRS XML schema guide
• FPS Finance — Belgian CRS guidance notes
• FPS Finance — Belgian FATCA business rules