Tax, SDIRAs & Cost Segregation10yFollowDo I need W9 or is Tax ID enough?Nghi LeInvestor / Lender · Seattle, WA · Member since 2014 · 1k+ posts · 730 votesI've been asking my contractors for their W9, and sometimes they just e-mail me their SSN/Tax ID.Is this enough, or do I actually need a W9 from them?0Reply26 views