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W-9 (U.S. investors):
- Form: https://www.irs.gov/pub/irs-pdf/fw9.pdf
- Instructions: https://www.irs.gov/instructions/iw9
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W-8BEN (non-U.S. individuals):
- Form: https://www.irs.gov/pub/irs-pdf/fw8ben.pdf
- Instructions: https://www.irs.gov/instructions/iw8ben
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W-8BEN-E (non-U.S. entities):
- Form: https://www.irs.gov/pub/irs-pdf/fw8bene.pdf
- Instructions: https://www.irs.gov/instructions/iw8bene
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W-8IMY (intermediaries):
- Form: https://www.irs.gov/pub/irs-pdf/fw8imy.pdf
- Instructions: https://www.irs.gov/instructions/iw8imy
- U.S. Tax Treaties: https://www.irs.gov/businesses/international-businesses/united-states-income-tax-treaties-a-to-z
