Alimony final payment

My ex wife received a judgment for 5 years of alimony. I paid her 4 and lost my job. I have been back in contact with her and she is willing to take less then what is owed and has had a letter notarize stating she will take 4k instead of 14k for final payment and release any judgments against me. Can she do this legally since it was court ordered alimony?

Thx