HI the owner usually pays the commission on a lease. You can search the internet for credit check score information for renters, etc.
You may also want to check with a property management company to assist with the whole process.
Best of luck
The owner of the home that is being leased is always the one that has paid my commission. There are many companies online that can run a credit check for a fee for verifying a possible tenant's credit and background. Try Googling "landlord information" or "rental credit check" and you should get some useful responses.
The homeowner will pay the agents commission. There are several companies that offer credit scores, you may want to try http://www.thelpa.com, but you can do a search and get others. Also, don't forget to verify employment history, background and rental history.