A writ of attachment or of sequestration shall issue only when the nature of the claim and the amount thereof, if any, and the grounds relied upon for the issuance of the writ clearly appear from specific facts shown by the petition verified by, or by the separate affidavit of, the petitioner, his counsel or agent.
The applicant shall furnish security as required by law for the payment of the damages the defendant may sustain when the writ is obtained wrongfully.