The Pima County Assessor’s Office will send out an estimated 50,000 notices to homeowners in the coming weeks.

It isn’t a bill, but there are roughly 200 good reasons for many to open the letter and more importantly, respond.

Several weeks ago, the county starting sending out the letters to comply with a new state law requiring homeowners — mostly those who own multiple properties — to designate which property is their main residence.

Failure to respond, said Pima County Assessor Bill Staples, could lead to owners losing tax credits for their primary homes. Staples said to the average homeowner, this would be a loss of roughly $200 annually.

The letters will be primarily sent to homeowners with multiple properties or those using an alternate address (other than a post office box) rather than to the property itself.

The Assessor’s Office will send the mailing to homeowners twice, and if there is no response, a third letter will be sent notifying them that their property has been reclassified.

So far, more than 3,400 properties have been reclassified for failure to respond, according to the county.

On Monday, the Pima County Board of Supervisors waived a penalty for homeowners who do not respond the to mailed notice, even if they agreed with the classification on the notice.

State law requires the county office to send similar letters every four years.

Contact reporter Joe Ferguson at jferguson@azstarnet.com or 573-4346.