This thesis deals with the problems that may arise in the awarding of contracts in the foreclosure of realty. This type of forced auction is the most severe intrusion into the property of the debtor, since it leads up to the loss of ownership of the execution object. This thesis presents possible errors that might emerge in the awarding process of the contract. The defects can, for example, be related to the execution conditions or the granting of the execution. The EO states in accordance with § 184 EO specific reasons, according to which the exhaustion of remedies is legal. Furthermore, it covers the legal possibilities to remedy deficiencies , and possible effects on the awarding process such as the occurrence of an overbid , re- auctioning of the execution object , or the abolition of the award of contract in accordance with § 187a EO . In addition to the EO, the regulations of the land charge register have to be considered for the determination of the award as well.