How to report rental payments to credit agency

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Hi.  I'm about to buy my first rental home and it's already tenanted.  I'm going to self-manage the property. 

How can I ensure that my tenant gets the "credit" for his on-time rental payments from the credit agencies?  I read something on experian that said they collect data from property management or rent collection companies, but what can I do as an individual landlord?

Thanks.