Used the Syrian legislatore in connection with the insurance whish is made by the partner in the common property, the principle of real substitution, the desire to stabilization of the transactions, to decide that the act remains true whatever the equivalent of the thing insured partner's share in a division. In spite of the principle of real substitution adopted by the legislatore, but the creditor's right to the insured remains pending on the decision does not settle down for the duration of common, and may be his fate, move to the money other than the creditor wanted it from contracting with the partner. And we will show in this research over the legal protection provided by the application of the principle of real substitution in estate insurance, and that through the study of the legal nature of the real substitution, and the impact of its application in estate insurance.