Even your closest relative can steal from you, so employ safeguards to protect your assets. August 1, 2009 EDITOR'S NOTE: This article was originally published in the June 2009 issue of Kiplinger's Retirement Report. To subscribe, click here.You may think you have nothing in common with the late Manhattan philanthropist Brooke Astor. Her son, Anthony Marshall, is on trial on criminal charges, accused of abusing the power of attorney his mother gave him to control her financial affairs. But power-of-attorney abuse doesn't happen only to the fabulously wealthy. Estate-planning lawyers and prosecutors are noting a rise in abuse, which usually is committed by a relative, friend or caretaker. "If the wrong person has the power of attorney, you can end up with a disastrous result," says Jeffrey Skatoff, a lawyer with Clark Skatoff, in Palm Beach Gardens, Fla. Even when older clients swear that their children or friends are above reproach, lawyers are recommending provisions to power-of-attorney documents to safeguard assets. These measures attempt to prevent designated agents from spending money on themselves or changing beneficiaries on estate plans. Advertisement A power of attorney authorizes an agent to take over financial matters if the person becomes incapacitated. The agent can pay bills, open and close bank accounts, trade securities and make gifts. Because the document grants so much discretion to someone else, select an agent while you're healthy and can make sound choices. Older people who have doubts about the capability of a possible agent -- perhaps, a son who is in serious debt -- should choose someone else. "They should name someone who's good with money and someone they trust beyond belief," says Jason Coomer, a lawyer in Austin, Tex. Courts do not supervise agents. You're not locked in to your decision. "If you no longer think you made a good choice, you can revoke the power of attorney and give it to someone else," says Naomi Karp, strategic policy adviser with AARP Public Policy Institute. Power-of-attorney laws vary from state to state. You can set up a power of attorney to take effect immediately. If you're still capable of handling your own affairs, you can build in protection by placing it "in escrow" with your lawyer. "We hold on to it until we can verify that the client is incapacitated," says Skatoff. Advertisement Another approach is a "springing" power of attorney, which springs into effect after you can no longer handle your affairs. Make it clear in the document how incapacitation should be determined, perhaps by getting the sign-off of two doctors. To prevent abuse, states are considering adopting the Uniform Power of Attorney Act, a model legislation approved by the National Conference of Commissioners on Uniform State Laws. The proposed law would prohibit an agent from changing an estate plan and from making gifts, says Lori Stiegel, senior attorney with the American Bar Association. New Mexico, Idaho and Colorado have approved the measure. Until your state passes its own law, you can take these precautions: Build in oversight. You could note in the document that the agent must answer to a third party. For example, if your daughter has the power of attorney, she would have to provide a written summary of her financial actions, such as check writing, to your son, best friend or a lawyer. Notify others. Tell other family members and financial institutions that you're granting someone power of attorney. They can then watch out for unusual activity, such as large withdrawals from a bank account. Advertisement Assign co-agents. Consider granting power of attorney to more than one person, perhaps two of your children, or a child and a trusted friend. "They can discuss the issues between the two of them, and each one can look over the other's shoulder," says Deborah Corlett, a lawyer with O'Brien Watters & Davis, in Santa Rosa, Cal. Limit the powers. For instance, you could allow your agent to pay bills and manage brokerage accounts, but not to change a will or the beneficiary designations on life insurance. For more authoritative guidance on retirement investing, slashing taxes and getting the best health care, click here for a FREE sample issue of Kiplinger's Retirement Report.