Obtenir un visa aux USA après un overstay

If you overstayed by even one day your visa is no longer valid. If discovered, you will be denied entry and returned home. If the inconvenience and/or humiliation do not deter you, you might consider the considerable expense involved, before you attempt to reenter the U.S. without a valid visa.
You will have to apply for a new visa at a U.S. Consular Visa Section in your country – When you do so tell the Consular Officer that you were told you would need a special Waiver before reentering the U.S. and you should provide all of the evidence pertaining to your ineligibility and the reason you are requesting a Waiver. If the Consular Officer is convinced that a Waiver should apply in the instant case then he or she will recommend that a Waiver be granted. This process can be very time-consuming and will be expensive.