How much International Reply Coupons do i need in a letter that i am sending to the USA from Australia?|118069

I_m gonna send a C4 sized letter to the USA and i live in Australia. I bought a few IRCs but i dont know how many to put in the letter. In order for them to respnd in the USA to Australia in a C4 sized envelope. How many IRCs do they need. Do IRCs exchange differently in different countries? How many do i need to send one to the UK?

I_m an amateur when it comes to the postal service.

it looks like you only need one according the USPS website
which I copied here

International Reply Coupons

International reply coupons (IRCs) provide foreign addressees with a prepaid means of responding to inquiries, solicitations, or other types of communications that are initiated by U.S. senders. IRCs are exchangeable for postage stamps by postal administrations in member countries of the Universal Postal Union (UPU). Each IRC is equivalent in value to the destination country��s minimum postage price for an unregistered airmail letter. The purchase price is $2.10 per coupon.

As of October 11, 2007, only international reply coupons printed by the Universal Postal Union can be redeemed at U.S. Post Offices. The valid version of the international reply coupons printed by the Universal Postal Union is approximately 3.75 inches by 6 inches, has a barcode on the back, and has an expiration date of December 31, 2009. This policy is for international reply coupons issued by the United States as well as for those issued by foreign postal administrations.

Most Americans don_t know what an International Reply Coupon is. Would it be something like the amount of postage?

You may get better answers by asking this question in the _AUSTRALIA_ section, or by calling your local post office and asking for the rates for international mail.