No they don't expire the only exception is the old pound, shilling and pence (£sd) values which have no postal validity now. You can use decimal currency stamps of any age as long as the postage is correct for the class of mail you used.
US postage stamps do not expire -- they are always worth face value as postage.
Yes. Postage stamps never expire. You just have to use enough to equal the rate for the item you are sending. The exception to this is Forever Stamps. They always maintain the current rate.
They never expire, hence the name 'forever stamps.'
No, food stamp benefits do not rollover to the next month. Any unused benefits will expire at the end of the month.
Not in the UK or the United States. You can use them even when the price has gone up after you bought them, as long as the face value adds up to the correct rate.
I have not quite sure what you mean by "Lady Liberty stamp", but except for some pre Civil War stamps, all unused US stamps are still good for postage at the price they sold for ( no adjustment for inflation.) The one exception is the new "forever " stamp which sell for current the first class rate, but automatically jumps in value when rates go up.
yes they do expire.
does ajinomoto expire
No they do not expire!
No, paychecks do not expire.
This milk will expire tomorrow.You coupon will expire next week.
Domestic postage for a standard letter is now .57 each, .60 with tax. These stamps do not have the rate on them, and never expire. This change was done as of Jan 11, 2010.