TODO_TAGS_REVIEW
TODO_AP2_EXPORT_REVIEW

W-8 Series Structural Validator

Validates W-8 series form structural consistency for withholding tax compliance. Checks: form-type/Chapter 3 status compatibility (FORM_CH3_MISMATCH for W-8BEN-E + Individual mismatch etc.), Chapter 3/Chapter 4 FATCA cross-check (CH3_CH4_INCONSISTENT), 3-year validity window expiring Dec 31 of third year per Treas. Reg. 1.1441-1(e)(4)(ii) (FORM_EXPIRED), and treaty dividend rate against IRS Pub 901 table (TREATY_RATE_MISMATCH). Returns is_structurally_valid, violations[], validity_expiry_date, and days_until_expiry. Structural form codes only. No TIN. Zero PII by construction.

Tool URL: https://ainumbers.co/chaingraph/art-269-validate-w8-series-structural.html

post/v1/tools/validate_w8_series_structural

Request

  • Base URL: https://ainumbers.co
  • URL: https://ainumbers.co/v1/tools/validate_w8_series_structural
  • Auth: none declared

Request body

chapter3_statusstring

type not evidenced by kernel source

chapter4_fatca_statusstring

type not evidenced by kernel source

form_datestring

type not evidenced by kernel source

form_typestring

type not evidenced by kernel source

income_typeunknown
reference_datestring

type not evidenced by kernel source

treaty_countryunknown
treaty_rate_pctunknown

Response

Successful tool execution result

ch3_ch4_consistentboolean
chapter3_statusstring
chapter4_fatca_statusstring
days_until_expiryinteger
form_ch3_compatibleboolean
form_typestring
is_structurally_validboolean
not_legal_advicestring
pii_notestring
regulatory_basisstring
statutory_withholding_rate_pctinteger
table_sourcestring
table_versionstring
treaty_countrystring
treaty_rate_expectedinteger
treaty_rate_pctinteger
treaty_rate_validboolean
validity_expiry_datestring
validity_window_okboolean
violation_countinteger

Changes

No recorded changes to this operation across all 1 revision of this API.