Domestic cash on delivery (COD) with perfin “MLU” in the stamp. The letter is franked correctly with 30 øre. which was the rate for domestic COD’s 0 – 25 kr in the period from July 1st 1920 to June 30th 1946. The stamp is cancelled January 11th 1921 with Købemhavn B Nr. 62a, København B. Bro IIIb-2. It can be seen at the backside that payment has been denied and the COD has been returned from Vinderup January 21th 1921.