Ost reg

Respected Sir/Madam, We have a property which is registered in my great grand father's name 100 years before. Since last 22 years there has been on & off civil suits filed by children's & grand children's of my great grandfathers brother (grand nieces & nephews). Suites are filed under Benami Act terming as coparceners and under HUF (the base on which the place arguments is on the mortgage documents filed some 40 or 50 years before by their grand father, but no where my great grandfather has obliged his inheritance in the said property and more over the property has been purchased and registered in my great grandfathers name). Till date we have received two decrees in our favor. There is an ongoing suite in district court which we expect to be closed in couple of weeks. In the meantime we came to notice that the petitioners has registered a deed on the suite property with their names where no adequate proof has been showed except for revenue departments receipts (like Kist, EB etc). Since the final trail is ongoing we expect a favorable outcome. But I would like to know what steps has to be taken in order to prevent the petitioners from filing further cases without proper cause of action. As the property is where we pursue agriculture which is a livelihood of my parents. Let me know if caveat would suffice for time alone?