The vast majority of postage stamps are produced by or under the direction of the government. Mail in most places is a government controlled business. The US used to print its stamps at the Bureau of Engraving and Printing, but currently much of the production is contracted to commercial firms.
Spain
You can print postage legally through USPS approved web sites. You can also rent a postage meter machine to print out postage. If you intend to defraud the government by not paying postage, yes, it is a Federal crime. To print fantasy post stamps is not illegal. US Stamps produced in Black and White or substantially different in size is not illegal. The images are copyright and subject to those restrictions as well.
All stamps issued by the government since 1861 are still valid for postage.
Queen Victoria. The very first postage stamps were produced in England in 1840.
Oregon is a state. Postage stamps are issued by the US Government. However, the US Government has issued several postage stamps that honor Oregon, including their state bird and state flower.
Yokiti Yamamoto has written: 'Japanese postage stamps' -- subject(s): Postage stamps 'Japanese postage stamps (for philatelists)' -- subject(s): Postage-stamps
Florida does not have stamps. The Federal Government issues postage stamps, not the individual states. They can be used anywhere in the United States.
Through internet we can easily purchase current international postage stamps.
Face value for postage remains valid until the government de-values them. In the US, stamps issued since 1865 are still valid for postage. The value to a collector varies based on supply and demand.
Yes, every country uses postage stamps.
US postage stamps do not expire -- they are always worth face value as postage.
Australia is one country that makes personalised stamps. Produced as pairs, one with the correct postage joined to one with your picture on it.