Double signature on the promissory note causes different legal consequences. Officials of commercial enterprises usually sign 2 signatures when signing a promissory note. The area where the second signature on the promissory note is located directly affects the legal result. This 2nd signature on the promissory note causes commercial companies to be liable to the debtor by giving a promissory note in some cases. The company becomes a debtor with the signature on the stamp. However, with a second signature outside the stamp, we can state that the company employee who issued the bond is personally the debtor of the promissory note.
In line with the decisions of the Court of Cassation, in order for the liability of the debtor to arise, the check, promissory note and bond must be signed by a single person. At this point, the signature outside the company stamp is an aval. In this case, the company official becomes personally liable. It is not possible for both signatures to be on the stamp. In order for a personal liability to arise, a signature must be placed in an area outside the stamp.
Promissory notes usually appear with a single signature. According to the Turkish Commercial Code, the signature of the person issuing the deed must be on the deed. Otherwise, the promissory note is not valid in any way. Within the framework of the law, only the signature of the issuer is required on the promissory notes. However, in practice, two signatures are often encountered in promissory notes. However, it is not possible to say that a deed containing two signatures is invalid. The presence of two signatures in the promissory note does not differentiate the result that will arise from the promissory note in any way. In other words, both single-signed promissory notes and double-signed promissory notes are valid. However, as mentioned above, double-signed promissory notes have some basic features. In order to realize these features, it is possible for individuals to have double signatures on the promissory note.