In most cases, no. The safe locksmith is trained to use an entry method that will not compromise the integrity of your safe. However, all safes are made differently, and some have features that others do not make use of, so it is very hard to give a general answer to this question. Rest assured that the first method our safe locksmith will employ will not cause any damage to your safe. Some of the other methods employed to unlock a safe might cause some forms of minor cosmetic damage, but these are only used if there is no success using the first few methods.