Can I require online payment for rent collection

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 OK I have an issue with one of my tenants.   I had excepted them conditionally based on them paying online via cozy to rent the property and they are now saying that it’s not in the physical lease and they don’t “trust“ online payments.    Can I legally require them to pay online or in my start excepting a money order from them and is there any ramifications that I can impose against them for failure to meet the conditions of Set forth. 

Lesson learned for me already is I need to change my lease to mandate online payments going forward because I honestly don’t want to deal with collecting rent.  

 This is a C class property, if that makes any difference. Everybody seems to have a checking account and bank somewhere so it’s not like we’re dealing with individuals that  don’t have any means or ability to have a checking account.  

Thanks. Learning daily of the loopholes people will use.  Slowly closing those loopholes.