Can I press charges against someone for writing me 2 bad personal checks?

Question Details:

I loaned a friend $960. I had her sign a paper saying she owed it to me by last month. She has written me 2 checks which the first 1 bounced for $450. The second is post dated for next week and I expect it will bounce also. Is there anything I can do? She will not answer my calls or the door for me. Important Notice