A policy has a geography, and it is written into the contract
Every motor policy defines a territorial limit, meaning the area within which the cover operates in full. Outside that area one of three things happens: the cover continues on the same terms, it drops to whatever the local law requires as a minimum, or it stops entirely. Which of the three applies is a question for the wording, and often for arrangements made between states rather than by insurers.
The middle outcome is the one that catches people out. It is not the absence of insurance. It is the presence of the wrong insurance. A broad policy operating abroad at a legal minimum still protects the people you might injure, which is what the minimum exists for. It does not repair your own car, and it may not respond to theft of it either.
Reciprocal arrangements are political, and they change
Groups of countries have long maintained systems under which an insurer authorised in one member state accepts liabilities arising in another, so that drivers do not need separate cover at each border. These schemes are creatures of treaty and regulation. Their membership, and the paperwork they demand, have shifted more than once within living memory, sometimes at short notice.
That is a genuine reason not to rely on what was true the last time you travelled, or on what a relative confidently remembers. Whether a document must be carried, whether the insurer must be told, and how long cover extends are all local and current questions. The insurer is the sensible first call, and the destination’s own authorities are the second.
Extending cover abroad is usually an act rather than a default
Many policies will restore full cover for foreign travel on request, sometimes at no charge for a limited number of days and sometimes for an additional premium. The request is normally required in advance, and the period has to be declared. Doing it after arrival, or not doing it at all, leaves the reduced position in force for the entire trip.
Where an extension is granted, it is worth confirming what travels with it. Breakdown assistance, courtesy vehicles, legal expenses and glass cover are separate products, and they frequently do not extend even when the motor cover does. The bundle that works neatly at home has a habit of coming apart at the border.
Getting a broken car home is the expensive part
The largest foreseeable cost of a trip that goes badly is not usually repair. It is repatriation. Moving an immobile vehicle several hundred kilometres across borders, and getting its occupants home separately, is a logistics exercise with a price to match. Motor insurance does not ordinarily do this at all; it belongs to breakdown or travel products, whose limits tend to be stated in distance or in money.
A total loss abroad raises a further question few people consider in advance. A vehicle written off in another country may have to be formally disposed of or exported there, and the settlement is still calculated against the market in which it was insured. The paperwork can comfortably outlast the holiday.
Local law does not pause because you are a visitor
Requirements about equipment carried in the vehicle, documentation, emissions stickers and driver licensing are set by the country you are in, and they are enforced against the driver present rather than the policy standing behind them. A penalty for a missing item is not an insurance matter, and no motor policy will meet it.
Liability rules differ too. How fault is apportioned, whether injury compensation runs through courts or through an administrative scheme, and how long the whole thing takes are all local questions. An incident abroad can take considerably longer to resolve than the identical incident at home, and that delay is part of the real cost of it.
Long stays turn a holiday question into a residence question
Almost every foreign-use extension carries a duration limit, expressed as days in a single trip or days across the policy year. Beyond that limit the cover simply stops extending. Someone spending a long period abroad with a vehicle, or leaving one there between visits, is outside what a domestic policy was designed to do, and no amount of goodwill changes that.
At that point the honest description is that the car is kept in another country, and that description changes the insurance question entirely, usually requiring local cover and often local registration. Insurers ask where a vehicle is kept for a reason. Answering it inaccurately in order to hold on to a familiar policy is a misrepresentation like any other, with the same consequences attached.