THE GENERAL RULE IS THAT ALL THE PETITIONERS OR PLAINTIFFS IN A CASE SHOULD SIGN THE CERTIFICATE OF NON-FORUM SHOPPING.

      However, the signature of any of the principal petitioners or principal parties,, would constitute a substantial compliance with the rule on verification and certification of non-forum shopping should there exist a commonality of interest among the parties, or where the parties filed the case as a collective, raising only one common cause of action or presenting a common defense, then the signature of one of the petitioners or complainants, acting as representative, is sufficient compliance.

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