What type of mortgage pertains specifically to immovable property in the parish of the notary's commission?

The type of mortgage that pertains specifically to immovable property in the parish of the notary's commission is a Property Bond. In Louisiana, a Property Bond is a legal instrument that secures payment or performance through the mortgage of immovable property, which encompasses real estate or land that is fixed in place and cannot be moved.

This legal framework is vital in the context of notarial acts, as it establishes the notary's role in authenticating the transaction related to immovable properties within their jurisdiction.

In contrast, other options pertain to different contexts. A Surety Bond is typically associated with a guarantee of performance or payment from a third party, not specifically tied to immovable property. A Fixed Mortgage generally refers to the mortgage's interest rate and term structure (e.g., it remains the same throughout the duration of the loan) rather than the legal aspects of property type. A Chattel Mortgage covers movable property, such as personal possessions or equipment, which is distinctly different from the immovable property context specified in the question.

Understanding these specific terminologies helps clarify the unique aspects of property laws in Louisiana and the notary's role in such transactions.