Many service contracts set limits on how far the car can be driven during the term. Those limits are only useful to you if the readings that prove where the car stood are recorded properly along the way. The mileage process is a chain of small steps, and a missing link at the start can make a valid claim hard to prove at the end.
Start with the reading at signing
Record the odometer when you sign, and write it down on a document you keep. Ask whether the provider uses that reading as its starting point, or whether it has its own inspection record. If the two numbers differ, find out which one controls before you drive away. An unclear starting point is the first place disputes tend to begin.
Learn what counts as a reading
Providers accept mileage evidence in different forms. Some take a dated photo of the dashboard, some take a shop invoice that shows the reading, some take a dealership service record, and some require entry through an online account. Read the contract or the claim instructions to find which forms are accepted, how the reading must be presented, and whether a reading has to come from a particular type of source.
Set a routine for keeping readings
Decide how you will capture readings on a regular basis. The simplest routine is to photograph the odometer each time you get an oil change or other routine service, and to save the invoice in the same folder. Ask whether the contract requires readings at set intervals, and what happens if a reading is missing for a stretch of time. Those answers tell you whether a gap is a formal problem or just an administrative one.
Handle the readings when a claim comes up
When you file a claim, the provider may compare the odometer at the time of failure with the readings on file. Ask how the comparison is done, whether the provider uses the reading from the shop or from its own records, and what happens if the numbers conflict. Keep copies of everything you send, and note the date and the person you spoke with on each call.
Plan the last reading before expiry or cancellation
Near the end of the term, or before you cancel or transfer the contract, record a final odometer reading and keep the proof. Ask what the provider needs for a cancellation or transfer calculation and whether a missing final reading delays the process. Starting that record early is much easier than reconstructing it later.
Check the sample contract for the exact rules
The mileage wording differs from company to company, so the safest step is to read it in the document itself. This site lists vehicle service contract companies that post a sample contract, which lets you read the mileage clauses before you commit. Compare the reading requirements in that text with the steps above, and ask the seller about any gap you find.