CHA voucher and RTA form

[Tina Kapur]

Hello
I had never heard of CHA voucher in chicago and RTA forms. What are these? Do i need to be certified or do some official thing to take in a tenant like that? I wanted to avoid all that since that (i am assuming) will make things complicated for me not to mention the timely payment of rent.
i am in Chicago cook county and in loop.. Am I obliged to take in a person who offers to pay by CHA vouchers?

The tenant toured my place, said is employed (+i googled) , came across to me as very polished  and came to tour the unit with her mom. The young lady is moving out of living with her parents, so I assumed she could afford to pay via a paycheck but she sent a text saying she will forward RTA form and CHA voucher.  Should I consider taking in the tenant or pass?