To oppose a grant of probate, or contest a will, you need to be able to show that you have a legal interest in that deceased estate.
contest a will
Illegitimate children are those born outside of marriage, or out of wedlock, in older terminology. These days the word “illegitimate” has largely been replaced in law by the term “ex-nuptial” – nuptial referring to marriage. Either way, can an ex-nuptial child inherit from their natural parents? Or contest a natural parent’s will for provision out of their estate? What if no will was left?
In succession law the court has discretionary power under family provision legislation to order provision from a deceased person’s estate to “eligible” applicants and in certain circumstances. It is not automatic.
The legal rules were introduced to remedy situations where willmakers failed to leave adequate provision for close family and certain other dependents as defined. It is not for second bites at the cherry. The court has wide power in deciding who pays costs of proceedings.