In order to access credit related information about a prospective tenant you must have their authorization to do so. Most rental applications should contain a standard clause authorizing this.
In order to obtain information on about their credit history, you can engage the services of a credit check agency. The following are examples of agencies that provide credit check services for landlords:
Rent Check Credit Bureau, www.rentcheckcorp.com 1-800-6617312;
GateMaster Inc, www.tenchek.com 1-877-823-0220;
SingleKey Inc., www.singlekey.com  1-877-978-1404; and
Tenant Verification Services, www.tenantverification.ca 1-877-974-9328.
DISCLAIMER: LSHC does not warrant or endorse or the services offered by the organization listed above.