Tax Lien Foreclosure Question

[Jared Chenel]

If a tax lien isn't paid by the current owner of a property and the owner of the tax lien certificate files for foreclosure, what happens next? 

It's my understanding that the property would then go to the courts to issue the tax deed foreclosure and then from there what happens? Does the owner of the tax lien certificate then have to bid on the foreclosed property? I've been trying to do research, but somethings contradict others.

I have watched some people explain it a few different ways and the simple explanation was you buy a tax lien, if it's unpaid, the tax lien cert. holder can file for forclosure and then they get the property. But that doesn't seem right?

Can someone explain the process to me?

I'm in New Hampshire if that matters.