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Support our research group with your time & talents and/or treasures; receive a tax deduction for the latter (given Marco Polo's 501c3 nonprofit status, your contribution is tax deductible to the fullest extent allowed by U.S. law).


  • Card: DonorBox or PayPal

  • Check:
    ICU, Inc. dba Marco Polo
    210 N 3rd Street #3
    Effingham, IL 62401

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  • Venmo: venmo.com/mp501c3

    Marco Polo is a reader-supported research group—become a patron. ($7/month)


EIN for tax deduction → 92-2605979

EIN 92-2605979
133KB ∙ PDF file
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IRS 501(c)(3) determination letter
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