A lightning affidavit is a short document with a specific job: a qualified technician's written attestation that lightning, and not wear, surge from the grid, or ordinary failure, caused the damage to a piece of equipment. Insurers ask for one because lightning claims live on a fault line in the policy: lightning is a covered peril on essentially every homeowners and renters policy, while gradual electrical failure and some off-premises surge losses are not, and a dead air conditioner looks the same in both stories. The affidavit is how the claim proves which story is true. This page covers when the document appears, who can write it, and how to handle the process well.
Why insurers ask for it
Lightning is among the named perils the Insurance Information Institute lists on standard policies, so a strike's damage, to wiring, HVAC equipment, appliances, electronics, is covered. But equipment also dies of age, of internal faults and of utility-side surges that policies treat differently, and after a stormy week adjusters see all of them claimed as lightning. The affidavit shifts the question from assertion to inspection: a technician examines the equipment for strike signatures, char, fused components, damage patterns consistent with a massive transient, and attests to the cause in writing. It protects honest claims as much as it filters doubtful ones.
Who writes one, and what it says
The affidavit comes from the technician who inspects the damaged equipment: an HVAC contractor for the condenser, an electrician for the panel and wiring, an electronics repair shop for what sat on the circuit. Insurers often supply their own form; where they do not, the technician's letterhead statement serves. A useful affidavit identifies the equipment by model and serial number, describes the observed damage specifically, states the professional conclusion that lightning caused it, and notes the storm date. Vague versions, customer reports lightning, unit is dead, invite exactly the follow-up questions the document exists to answer.
Building the claim around it
The affidavit lands strongest inside a coherent file. Note the storm's date and time while it is fresh, since public lightning strike data can corroborate a strike near your address, and photograph any visible evidence, scorched outlets, a struck tree, damaged roof penetrations, before repairs. Do not discard damaged equipment until the adjuster releases it, because the equipment is the evidence the affidavit describes. List everything that failed at the same moment, not just the expensive item, since simultaneous multi-device failure is itself a strike signature. Then keep the repair invoices, which establish the loss's size.
The boundaries worth knowing
Two distinctions decide edge cases. Lightning versus off-premises surge: a strike on or near your home is the covered peril, while some policies treat surges arriving from the utility's lines differently, so where the affidavit can honestly localize the strike, it should. Repair versus replace: policies pay to restore, and the technician's view on whether the equipment is repairable belongs in the document. Prevention sits outside the claim but inside the subject: whole-house surge protection is cheap against Florida-grade lightning seasons, and some insurers discount for it. None of this coverage requires an affidavit in advance; the document is a claims tool, produced when the loss occurs.
Questions people ask about lightning affidavit
What is a lightning affidavit?
A technician's written attestation, often on the insurer's form, that inspection shows lightning caused specific equipment damage, identified by model and serial number. Insurers request it to distinguish covered strike damage from wear or ordinary failure.
Who can write one?
The qualified professional who inspected the damage: an HVAC contractor, electrician or repair technician for their respective equipment. Specific observations and a stated professional conclusion make it effective.
Is lightning damage covered by home and renters policies?
Yes; lightning is a named peril on standard policies per the Insurance Information Institute. The affidavit exists because covered strike damage and uncovered gradual failure can look identical in a dead appliance.
What strengthens a lightning claim besides the affidavit?
The storm's date and time, photos of visible strike evidence, retention of the damaged equipment until released, a complete list of everything that failed simultaneously, and the repair invoices.