The
Mishnah carefully tries to prevent evasion of the scriptural injunction against usury, preferring to forbid
moral usury to trying to mitigate the scriptural rules in this area. According to the Talmud, the debtor would be as guilty as the lender, since it interprets one of the biblical verbs referring to
usury, namely
tashshik, to be in the
causative voice; in
English Law, the
mortgage was invented to take advantage of this exception. If witnesses support a claim that it had been agreed to repay a debt by a certain date, but they are proved to be lying, and the correct repayment date to be a different date, according to the Mishnah, the false witnesses must pay the amount accrued due to the difference in value of the thing between the two dates. The Mishnah forbids the drawing of interest and dividends from investments, arguing that people should instead buy land and draw income from it. likewise, the exchange of labour between two individuals was forbidden by the Mishnah, if the work by one of the individuals would be more laborious than the other. effectively this meant that rabbinical courts made judgements in cases of usury, but refused to enforce them by anything other than physical attacks against the lender's body.
Heter Iska The Mishnah forbids arrangements where a supplier gives a product to a shopkeeper to sell in return for a portion of the profit, since it views the supplier as effectively loaning the product to the shopkeeper, while ignoring the fact that the shopkeeper takes on the risk of theft, depreciation, and accidents. this mechanism to permit profit being gained by a lender, in a business transaction between lender and debtor, was formalised as the
Heter Iska, literally meaning
exemption contract, which worked in exactly the same way as the earlier Sumerian business partnership contract between lender and debtor. Like all contracts, there are sometimes disputes, and the parties may resort to secular courts, running the risk of the court imposing interest, or other conditions which are contrary to
Halakhic principles.
Other evasions There were also a number of methods of evading the anti-usury laws completely, identified in the Mishnah. One of the simplest methods was for a person to lend something to another and buy it back from them at a reduced price ==In rabbinical literature of the Middle Ages==