Under Order XXX rule 2 of the Code of Civil Procedure, 1908, partners instituting a suit in their firm…

A defendant may demand the partners' names and places of residence in writing when the suit is brought in the firm name. The plaintiffs or their pleader must then provide the written declaration promptly, making this a disclosure within the litigation.

Why not "in a local newspaper."? The rule does not require publication of the partners' details in a local newspaper. Its purpose here is to identify the persons behind the firm-name claim for the demanding defendant. Public advertisement is a different procedure and does not replace the specified written disclosure.

Why not "in a national newspaper."? National newspaper publication is not the disclosure method prescribed by this rule. The obligation arises from a written demand by or on behalf of a defendant in the suit. The required response identifies the partners to that litigation participant, rather than informing the public generally.

Why not "to all their creditors."? The provision does not direct the suing partners to notify every creditor of their identities and residences. It creates a particular disclosure right for a defendant who makes the required written demand. General commercial relationships with creditors are not the statutory trigger or recipient class.