There are two problems with this. At least in the US. Your credit is tied to your social not just your name. The credit bureaus and credit companies themselves also have allot of tools at their disposal to link people together. I can tell you that the bureaus themselves will list aliases at the top of bureaus to help credit companies out. These aliases are found from cross referencing multiple data together.
The second problem is clear debt is the wrong word to use. The debt does not go away because you do not answer the phone, and say yes it's me. The debt will always remain until paid in most cases.
PS: There is also a statute of limitation argument that is usually used as a get out of debt free argument. This is also false. If you were to let's say disappear. Change your name. Make sure that your family, friends, old friends, old relationships, co workers, boss, old boss, neighbors, old neighbors, old roommates, etc all not know where you went, or cover for you, and are never tracked down to be served, and do not need to use your credit for a home purchase, rental history, car loan, cell phone, credit card, refinance of any debt, etc then in most US states the statute of limitations will usually hit after about 3-4 years. After this time you cannot be sued for the debt owed, but the debt can be sold to another company or still collected by the originating company. They can still call you, and yes it will still be on your credit as a debt owed.
I am giving you this info because I think there is nothing worse than an attorney, or so called credit counselor scamming people out of money telling them that they can get them out of debt with these techniques when they are not helping at all. The best advice I can give is do not get into debt. If you do stand up, and take responsibility for it. Work with the people you owe, and educate yourself even before believing everything is attorney tells you. Remember that they are there to make money also.