Trinidad & Tobago: Aerogramme Posted Underpaid Twice

20c aerogramme returned for additional postage, but posted underpaid a second time and sent to Pakistan on 17 March 1976. The aerogramme was initially returned to the sender for paying the missing 5c to the 25c aerogramme rate for Pakistan. Endorsed „Returned for 5c … postage“. However, the sender did not pay the additional postage and posted the underpaid aerogramme a second time.

As the aerogramme was only prepaid at 20c, it was taxed „10/15“ (double deficiency as the numerator, international surface mail rate as the denominator according to the Vienna system) when posted the second time. This is incorrect as the Lausanne system, which required the single deficiency in the numerator, was in place since 1 January 1976.
 
In Pakistan, based on the „10/15“ tax fraction a postage due of Rs 17 was calculated.

Canada: Forces Air Letter Form Used in UNMOGIP Operations

 

 

Canadian Forces air letter form sent by a member of UNMOGIP (United Nations Military Observer Group in India and Pakistan) to Canada in February 1974. Originally franked with Pakistani stamps, the air letter was taxed as short paid and returned to the sender  for 50 Paisa additional postage.

 

The instructional handstamp reads "KAR. AIR 3 / DATE.......... / UN-PAID / RETURNED / PLEASE AFFIX / ......... PAISA / STAMP MORE". A box to which the additional stamps were to affix is on the right hand side of the instruction.

However, no additional Pakistani stamps were affixed and the air letter most likely travelled to UN headquarters in New York in courier mail. There, a 11 c UN New York stamp was affixed and the letter was forwarded to Canada on Feb 19, 1974.

In 1974 the air letter rate of UN New York was 15 c.