THE BEST SIDE OF EXTRAJUDICIAL SETTLEMENT OF ESTATE PHILIPPINES

We have properties inside the Philippines and my sisters and I are co-entrepreneurs with our mother, which means all our names are over the title of ownership.Question: Let's say the one of many heirs died? Who'll signify them in signing “Deed of Extrajudicial Settlement of Estate”? Example: The mom title has 6 heirs and a pair of on the heirs