Locating an old friend who you haven't seen in a few years is hard enough when you have her current name. The difficulty is amplified when the person has married or changed her name. Don't despair, there are a few ways to find someone after a name change.
Do a phone book, Internet or directory-assistance search for the person using the her new name. Of course, this is only possible if you know the person's new name. Keep in mind that the person's home phone number and address may be listed under a spouse's name.
Talk to a family member or another friend of the person who changed names. This person probably knows the new name of the friend and can also can tell you her whereabouts and phone number.
Find out the person's new name. Do this easily by searching marriage and engagement listings in the person's hometown or current city of residence newspaper. The spouse's name will be listed there. Another option is to pay a visit to the department of vital records in the town where the friend lives. You can usually locate someone's marriage certificate by searching for the person's previous name.
Send a piece of mail to the last address you have for the person using her previous name. Under your return address write "Address Forwarding Information Requested." If the mail cannot be delivered to that address, the post office will return the mail to you along with the person's new address.