Linear  band of immunofluorescence (due to immunoglobulin deposition) along the dermo epidermal junction (Ribbon candy pattern) is seen in
Bullous pemphigoid shows Linear band of immunofluorescence (due to immunoglobulin deposition) along the dermo epidermal junction (Ribbon candy pattern).
Bullous pemphigoid
Dermatitis Herpetiformis
Phemphigus vulgaris
Lichen planus