Swan Revenue Stamps Cancellation

How many kind of the cancellations?

Help me!
Why had signed or other cancellations in Western Australia difference Swan revenue stamp?

Hi Wayne,
I apologise if I have misunderstood your question. Are you asking why these revenues have been cancelled with handwriting?
I believe it is because they were used in offices where they were stuck on to a document, and then "cancelled" to show that the tax (revenue) had been paid. Many offices just wrote the date or a signature across the stamp to cancel it. It will be the writing of a clerk or secretary in the office.

Thanks to stampgal,
Im so interesting the cancelled type.
Orginally,I had many different Seal of the cancellations,but just missing out ,today I have only left these.
Another questions are:
1) What's situations the Officer can wrote on stamps to replaceed the seal used for represent the tax (revenue) had been paid?
2) Handwriting have fake things?and how to reading the signature content across the stamp?

These are what's know as Revenue Stamps. They are not valid for Postage and the cancels will be different from Postal cancels. The Hand writing is known as a manuscript cancel and the other is what's called a Fiscal cancel. I have never seen a forged Manuscript cancel as they usually detract from the value of a Stamp, so why forge one.