There are multiple definitions - click on the translation that matches your context.

arresto

substantivo

partial

attachment

noun

Comparative law notes

"Arresto" is a provisional remedy whereby a sufficient amount of the defendant's property is seized to cover the defendant's indebtedness and secure satisfaction of the potential judgment. The purpose of an "arresto" is to prevent the defendant from making himself judgment-proof, i.e, to make sure that the plaintiff is able to collect on the judgment if the plaintiff prevails. To highlight the fact that an "arresto" takes place BEFORE final judgment, one might place the word "prejudgment" before it and translate it as "prejudgment attachment".

Definitions of attachment

the action of taking temporary possession of someone's assets, especially when they may be needed for the payment of a judgment in a judicial proceeding

Because he failed to pay child support there was an attachment order placed on his wages.