Malpractices of a shopkeeper:

1. They charge more than the maximum retail price.
2. They alter MRP and stick their own price.
3. They sell adulterated items with attractive packing.
4. They try to promote the sale of items which are expired or sell items which fetch them a higher commission.
5. They use faulty weights and measures.
6. They do hoarding and black marketing of items, create an artificial scarcity of items.Manufacturers:

Malpractices of a Manufactures

1. Manufacturers use imitated labels.
2. They pack less than the quantity written on the label.
3. They produce inferior & adulterated goods. 
4. They use the fake standard mark.
5. They give exaggerated advertisement and do not inform about the weakness of their products.