"How will I know that she has properties registered under her name?"
Check it out at the office of the Register of Deeds.
I suggest you file a case early and apply for the issuance of Writ of Preliminary Attachment. There has to be a case because the Writ is only issued if there is a pending case. With the attachment in place, she cannot dispose of her attached properties. The said Writ may be made on her properties such as cars, bank deposits, shares of stocks etc. You can also ask the court that her debtors be ordered to make the payment to you instead of her, but you have to establish your case first.