This article examines the classification of debts in co-ownership relationships, focusing on the legal distinctions between ordinary and privileged debts. In shared property ownership, such as in apartment buildings, a legal entity called the syndicat is formed to manage the property. This entity has its own property and responsibilities, separate from the individual co-owners. A syndic, who can be a professional or a volunteer co-owner, acts as a representative of the syndicat and manages its affairs. Understanding the difference between ordinary and privileged debts is crucial for determining the order in which debts are paid and the likelihood of recovery. Debts owed by the syndicat to the syndic, such as management fees and reimbursement of expenses, are considered ordinary claims. Even though there are specific legal procedures for handling financial difficulties, the syndic's claim remains in the category of ordinary debts. However, the 1965 law provides a specific framework for financial challenges, including the possibility of appointing an ad hoc administrator to manage the situation. When the syndic is the debtor, the syndicat's claim for the return of funds managed on its behalf is treated as a property right, not a simple claim. This means the syndicat can demand the return of funds without competing with other creditors of the syndic. However, if the syndic has not maintained a separate account or has mixed funds with personal money, the syndicat may find itself in the position of an ordinary creditor. The syndic's civil liability for management failure results in an ordinary claim for damages. Additionally, the Hoguet law requires professional syndics to have a financial guarantee to ensure the reimbursement of funds they manage on behalf of others. Debts owed to third parties, such as suppliers, taxes, and banks, are generally the responsibility of the syndicat. Suppliers and construction companies typically have ordinary claims, though there is a theoretical legal mortgage for certain workers. Public treasury and social organizations benefit from a privileged status, while banks remain ordinary creditors unless a specific guarantee is in place.