According to this complementarity, the microscopic state of black holes with apriori singularity such as those described by the Schwarzschild metric will be unique and they will not experience Hawking radiation because infinitely long time is needed for any particles resulting from the vacuum pair production to fall across the horizon and hit annihilation partners inside it. However, for black holes with inner structures endowed by this complementarity, matter is distributed in a region slightly larger than the horizon size, rather than accumulating on a central point. So particles falling towards the horizon will find annihilation partners as they get to the horizon close enough. The requirement that the ingoing partners of all truly detected outgoing Hawking particles annihilate with particles inside the matter region within the time allowed by the uncertainty principle will couple Hawking particles with the change of microscopic state of black holes. This implies that hawking radiation happens through mechanisms of gravity-induced spontaneous radiation or other similars.