take a picture of the odometer?

take the car to an inspection facility and get an inspection done. Should note the odometer on the inspection report.

Take care to dealer. have them scan the vehicle and print our a vehicle health report. again should have the mileage printed...

Ask the warranty company what they require on an odometer statement?

or you can google odometer statement....

https://www.google.com/search?client=firefox-b-1-d&q=odometer+statement

I need to secure an odometer statement to cancel an extended warranty for a vehicle--anyone know how to get one?