No. In my opinion, The mother owned the entire building at that point. The daughter did not rent, therefore the mother could not lose any existing exemption. I believe the mother had the right to claim the entire property since there was no rental. The notice of unpaid taxes does not transfer to a subsequent buyer. Mail is not a valid proof of residency in regards to homestead exemptions.
Although any one factor is not conclusive of the establishment or nonestablishment of permanent residence, the following are relevant factors that may be considered by the property appraiser in making his or her determination as to the intent of a person claiming a homestead exemption to establish a permanent residence in this state:
(1) A formal declaration of domicile by the applicant recorded in the public records of the county in which the exemption is being sought.
(2) Evidence of the location where the applicant's dependent children are registered for school.
(3) The place of employment of the applicant.
(4) The previous permanent residency by the applicant in a state other than Florida or in another country and the date non-Florida residency was terminated.
(5) Proof of voter registration in this state with the voter information card address of the applicant, or other official correspondence from the supervisor of elections providing proof of voter registration, matching the address of the physical location where the exemption is being sought.
(6) A valid Florida driver's license issued under s. 322.18 or a valid Florida identification card issued under s. 322.051 and evidence of relinquishment of driver's licenses from any other states.
(7) Issuance of a Florida license tag on any motor vehicle owned by the applicant.
(8) The address as listed on federal income tax returns filed by the applicant.
(9) The location where the applicant's bank statements and checking accounts are registered.
(10) Proof of payment for utilities at the property for which permanent residency is being claimed.
The rental of an entire dwelling previously claimed to be a homestead for tax purposes shall constitute the abandonment of said dwelling as a homestead, and said abandonment shall continue until such dwelling is physically occupied by the owner thereof. However, such abandonment of such homestead after January 1 of any year shall not affect the homestead exemption for tax purposes for that particular year so long as this provision is not used for 2 consecutive years.