Lease Signed - No payment for over a month...

[Don Belsky]

Here's the story. I showed a single family house to a woman who had left her job because her father was ill and needed her help. Her father died and she was looking to relocate and start a new job soon... I agreed to rent the house to her because she would pay a full year in rent up front via cashiers check. She was supposed to meet my realtor on Saturday, sign the lease, pay and get the keys. On Saturday she had an accident on the way to the realtor... After being an hour late she called him to cancel the meeting and reschedule for Monday morning. Monday morning she doesn't show up to the meeting. I call her and she's busy trying to rent a car.... My realtor was fed up and advised me to continue showing while I might wanna try and communicate with her directly.. So I contacted the woman and made up a time to meet at the property the following Monday at 2 PM. After waiting at the property for close to an hour she texts me that her mother fell ill and she's with her at the hospital... She really was hoping to leave, but she realizes that she can't... So we made up that she'll sign the lease electronically and overnight the cashiers check to me. Sure enough, she signed the lease electronically, and said she'd go next day to overnight the check. Long story short, it's now over a month since then, she's used every excuse in the book, and the money is not here. I haven't communicated with her the past 2 weeks and I have some serious interest from quality tenants. What do I need to do in order to terminate the lease? Or is it by default not in effect because she didn't pay the down payment? Bottom line, I wanna be protected if she comes after me with a copy of the signed lease.. In hindsight I should've never signed the lease before she did... I should've gotten her to sign & pay and only then sign it...