Federal Tax Lein on a purchase

[Jason Crowe]

I am in a transaction where there is a Federal Tax Lein involved.  The Hard Money Lender will not close without this Lein satisfied.  The Lein is over 15 years old, I am reading and the IRS indicates this type of Lein falls off after 10 years I believe.  Is this accurate?  I feel I've been told many different time increments but want to know which time period is accurate for it to fall off if IRS does not reinstate or refile the Lein.  What is the time frame for a Lein to fall off of a property?