The delivery of [Products] arrived on [date]. We were surprised to find that the delivered quantity does not correspond to the order. Only [delivered quantity] has been received, which is short of [ordered quantity] originally ordered. We attach photos of the delivered goods for your information. [The invoiced quantity was also incorrect.] [We signed the delivery note prior to inspecting the quantity, but as you can see from the photos, only [delivered quantity] has been delivered.]