State
DR 0160: Certificate of Exemption for Colorado State Sales/Use Tax Only
DR 0240: Colorado Fuel Tax Exemption Certificate
City and County of Denver
City and County of Denver: Retail Sales/Use/Lodger’s Tax License
City and County of Denver: Sales Tax Exemption
Multi State Tax Exemption
Uniform Sales and Use Tax Resale Certificate — Multijurisdiction
Federal
W-9: Request for Taxpayer Identification Number and Certification