Individuals and organizations should repay their debts as soon as possible. If a foundation owes more than 10 years, it still has the obligation to repay. In this case, you can negotiate with the foundation and urge it to repay the arrears as soon as possible. Through communication with the foundation, we can understand its willingness and ability to repay and try our best to reach the agreed repayment plan. This requires cooperation and compromise between the two sides to find a solution and ensure the payment of arrears. If negotiation fails or the Foundation refuses to fulfill its repayment obligations, it may bring a lawsuit to the court. In court proceedings, it is necessary to provide relevant evidence to prove that the Foundation does have arrears, and request the court to judge the Foundation to repay the arrears. The court will make a judgment and execute it according to relevant laws and evidence to ensure that your rights and interests are protected.