As a general policy for both landlords and tenants I DO NOT recommend accepting/making rent payments in cash. First, cash is not easy to send securely and second, there is no record of payments received in cash (which might be why some landlords like it, so they don’t have to report it on their taxes). For rent payments made in cash, always ask the landlord or Manager to give you a receipt to prove that you paid. That way, no one can come back later and say you didn’t pay, and then you are responsible for paying rent twice.
Another downside of cash is there is a real risk of robbery if you carry large amounts of cash on you. Back in the 1980s in LA, I heard some real estate stories of Vietnamese and Korean Landlords walking to the bank with an ex-military escort toting an AK 47. Cash is very popular form of rent payment for Asian landlords.
I think this is common knowledge, but never hurts to restate- Never send cash in the mail. Someone at the post office will probably open the package and steal it. If the cash is stolen, you are still responsible to pay rent- so you will have to pay twice. Cash requires hand delivery (which usually means time restrictions to during normal business hours Monday through Friday), which is very inconvenient, or impossible if landlord lives far away, which is why many landlords refuse to accept it as a form of payment.
Cash does have some advantages- cash can’t bounce like a personal check. Also, there is no transaction fees to pay rent with cash. And there is something visceral about holding cold hard cash in your hands that you don’t get with an electronic transfer.
If you insist on cash, I strongly recommend considering cashier’s checks or Money Orders– for a small fee, they are as good as cash, however, they can only be cashed by the intended recipient and are safe to send, and create a record of payment.