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101EINReject.US

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How we research

The decoder logic, code-detail pages, and SS-4 walkthrough are derived directly from primary IRS sources. Every citation links to the source document so you can confirm each claim yourself.

  • 1 · Source-first

    Every claim starts at IRS Pub 1635, Form SS-4 instructions, or 26 CFR §301.6109-1. Third-party explainers are not used as primary sources.

  • 2 · Plain-English, then the source

    We explain each reference number in plain English and link the primary IRS document so you can read the exact wording yourself. We never invent the IRS's literal text — where we don't yet have it verified, we link the source instead of paraphrasing it as a quote.

  • 3 · Cross-check against the source

    Each code page is checked line-by-line against the primary IRS reference it cites before publication. We do not yet have a named credentialed reviewer on staff — when one is engaged, their credentials will appear on the About page.

  • 4 · Linked citation pins

    Every citation pin links to the primary IRS source it draws from, so you can open the document and confirm the claim yourself.

  • 5 · No fabrication

    If the primary source doesn't document a code or fax address, we leave a visible placeholder — never invent text. This applies to reviewer credentials too.

  • 6 · Privacy

    Decoder + pre-flight inputs are processed in your browser only. We never POST rejection text to our servers and only log aggregate code-frequency counts.