Florida Statute 627.70131 states,”Insurer’s duty to acknowledge communications regarding claims; investigation.—
(5)(a) Within 90 days after an insurer receives notice of an initial, reopened, or supplemental property insurance claim from a policyholder, the insurer shall pay or deny such claim or a portion of the claim unless the failure to pay is caused by factors beyond the control of the insurer which reasonably prevent such payment. Any payment of an initial or supplemental claim or portion of such claim made 90 days after the insurer receives notice of the claim, or made more than 15 days after there are no longer factors beyond the control of the insurer which reasonably prevented such payment, whichever is later, bears interest at the rate set forth in s. 55.03. Interest begins to accrue from the date the insurer receives notice of the claim. The provisions of this subsection may not be waived, voided, or nullified by the terms of the insurance policy. If there is a right to prejudgment interest, the insured shall select whether to receive prejudgment interest or interest under this subsection. Interest is payable when the claim or portion of the claim is paid. Failure to comply with this subsection constitutes a violation of this code. However, failure to comply with this subsection does not form the sole basis for a private cause of action.”
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http://www.leg.state.fl.us/statutes/index.cfm?App_mode=Display_Statute&URL=0600-0699/0627/Sections/0627.70131.html