Best methods of collecting rent

[John Reid]

BP Friends,

How do you guys collect your rent? Do you have an automated way for your tenants to pay or do you accept checks or cash. I am closing on my first duplex in a couple weeks and I am trying to get all of my ducks in a row. I thought I heard of some websites or apps or something that tenants can use to pay their rent. 

I heard on one of the podcasts that you should not accept partial payment if your tenants are late with rent, if you have an automated process of accepting payments cant your tenants say they paid you and you accepted it. 

What are your thoughts?