An attachment of money or goods belonging to the debtor, as owing by or in the hands of a garnishee. But it may not only be obtained after judgment, when it is called an Arrestment in Execution, but during the progress of an action, when it is called an Arrestment on the Dependence, — or at the commencement of an action against a foreigner, when the Court has not otherwise jurisdiction over him, and when it is therefore called an Arrestment ad jurisdictionem fundandam. In any case it may be ""loosed"" on application of the debtor, either simply, when it had been improperly obtained, or on the debtor deposityig the amount of the debt in Court, or giving security for it. If not loosed the arrestment is carried into effect, on the debt being established, by an action against the holder of the money or goods, called an action of forthcoming.

Source: Kinnear, Digest of House of Lords cases (1865), pg. 348.