CALIFORNIA FAMILY LAW
...Procedure After Trial/Hearing
......Attack on Judgments/Orders
.........Res Judicata
2 Cards On This Topic:

H precluded by res judicata from litigating concealment defense a year and a half after arrears set in stipulated judgment.

Denial of writ of mandate or writ of prohibition without opinion is not a decision on merits so has no res judicata effect.