Can one person's sr22 insurance cancel the existing auto insurance policies of other people who share the same residence?

No, Your Insurer has no ability to cancel the insurance policies of another Insurance company nor of other people in your household whether they have an SR22 or not. An Insurer only has an ability to cancel the policy of their own insured(s). if the insured no longer meets it's underwriting guidelines. The other people in your household's insurance could only be cancelled by themselves or by their own Insurer. This could happen if their Insurer determines that an uninsured, unscheduled driver in the same houshold may be operating their insured's vehicle. SR22 insurance is exactly the same thing as Auto Insurance. SR22 Insurance is a laymans term for a Form SR22 filing requirement. This is usually requested in order to avoid a drivers license Suspension. An SR22 form filing is not a type of insurance but rather the Form SR22 is Proof to a Governmental Drivers License Authority, " usually your local dmv", that you are currently insured under an Auto Insurance Policy produced by the SR22 Form Filer. The SR22 is usually filed by Your Insurance Agent if you have one or your Insurance company's underwriting department. The SR22 form is Issued by the insurer or the insurers representative at the insureds request and is generally the result of a regulatory or court ordered requirement after certain types of traffic violations or other high risk offenses. The ordered filing requirement is usually 1 to 3 years from the date of a related offense or from the date of license suspension.