No, it is not true as a general matter: the bank that loaned you money or financed your car has a security interest in your car but is not your insurer. It is not obligated to provide collision coverage, and, furthermore, should not have been able to put such coverage on your car without your knowledge or consent. You can certainly inquire of the bank if they have any collision coverage (though if they do, it would likely  be for their benefit, not yours--e.g. to pay off the loan if the car is totalled), but there is no particular reason to believe they have provided this coverage for you.