The Maricopa County Treasurer sent out about 35,000 final tax delinqueny notices in early December. About 10,000 people will pay up by January.

He expects about 20,000 tax liens will go up for auction on February 1, which is fewer than in previous years. (Bubbleheads, please take note, “fewer.”)

The county put the nationally popular auction entirely online in 2006, and will do so again this year, beginning mid-month. The county is adding some enhancements in mapping information and site navigation. A firm date for the online auction site to open for bids will be announced soon, Schweikert said.

The Maricopa County Treasurer’s web site is, http://treasurer.maricopa.gov.

In addition to tax liens, the Treasurer also auctions properties directly online.