It is frequently encountered in employee-employer relations that bonds are received from the workers at the beginning of and after the employment contract. In order to be recruited, sometimes consciously and sometimes with the thought of being hired, the worker can also sign these bonds as drawn by the employer. In our study, first of all, the purpose and legal nature of the bonds, the form of the bond and the legal consequences to which the bond is subject are evaluated and the subject is discussed in terms of labor law practice. Different possibilities may arise in the acquisition of such securities. These are; adding of annotations on bond such as “guarantee” or “warrant value” by the employee or employer, the receipt of the bond only with a signature from the employee and leaving the rest blank or explaining in detail the status on which the bond was received. In such disputes, the Court of Cassation departs from the general proof conditions regarding the bills of exchange by referring to the principle of “protection of the workers”. At this point, the Court of Cassation accepted the proof by witness evidence as valid, contrary to such disputes, which are normally based on written evidence. Considering the concrete cases, we think that the approach of the Court of Cassation to such disputes between the employee and the employer in general is correct.