The launch of the new £10 note has been accompanied by a flurry of excitement, with notaphilists (yep, that's actually a word) racing to get their hands on the bills with the smallest serial numbers.
But while the collectors, Jane Austen enthusiasts and general trivia-lovers rejoice, you may be wondering how to be sure your new tenner is real. Most people won't have seen the note before, so there's plenty of potential for scammers to get to work.
Thankfully the new note has several features to help people ensure their money is real.
The Bank of England has pledged to crack down on counterfeits, and they've certainly done their level best when you look at the various codes and patterns woven into your new ten-bob sheet.
Like the new £5 note, the £10 version includes a see-through window. This has a picture of the Queen on it with the words '£10 Bank of England' written twice around her head. A metallic picture of Winchester Cathedral is also printed over the window, but is gold on the front of the note and silver on the back.
There is also a pound symbol in two different colours on either side of the window; on the front it's silver and on the back it's copper. If you tilt the note you should also be able to see a rainbow effect on the clear window and a colour quill to the side of the window should change colour from purple to orange.
The rainbow effect is also used at the top of the note, on a raised image of the coronation crown. Behind this on the back of the note there is a copper foil shaped like a book containing the initials JA - presumably a nod to the note's inspiration.
The reason Jane Austen is printed on the back of the note is because 2017 is the 200th anniversary of her death. The novelist was buried at Winchester Cathedral which is why an image of the famous church also appears on the note. She replaces Charles Darwin, but of course, an image of the Queen remains on the front of the note.
By using a magnifying glass you can see that the letters underneath a picture of the Queen spell out the value of the note in both letters and numbers.
The front of the note includes raised print which you can feel by running your fingers across the note on the words 'Bank of England' and the number 10 in the bottom-right corner.
As if all those features aren't enough, there's also a hologram - just like the old £10 note in fact. This time instead of a number 10 and a picture it features the words 'ten' and 'pounds' and the shape of the hologram is a book.
Ultraviolet light also plays a part in the security masterplan; when the note is placed under the light a number 10 at the top of the note becomes visible. The number is bright red and green.
It also includes raised dots on the top right hand corner on the front of the note. There are four in total: the four dots constitute a brail symbol and they ensure that blind or partially sighted people can easily identify the money.
If you were worried about forgeries before, hopefully you'll now feel a bit more confident!