Direct immunofluorescence(DIF) is negative in:
Bullous Pemphigoid
Cicatricial pemphigoid
Epidermolysis Bullosa Dystrophica
Pemphigus Folaceous
All of the above are autoimmune disorders except Epidermolysis Bullosa Dystrophica which is because of defective collagen.7 in dermis and hence DIF is negative.