If you've ever noticed a banknote serial number reads the same forwards and backwards, you might be holding a radar note — and it could be worth significantly more than face value.
Radar notes are among the most popular fancy serial number patterns. They're named after the word "radar" — which is itself a palindrome — a sequence that reads identically in both directions.
How to Identify a Radar Note
Strip out any letter prefix or suffix and check whether the remaining digits read the same in both directions. A US dollar has 8 digits — compare digit 1 with digit 8, digit 2 with digit 7, and so on. Or use our free checker which identifies radar notes instantly.
What Makes a Radar Note More Valuable?
Within radar notes, certain variations command extra premiums: Super Radars (inner six digits identical), radar star notes (replacement note + palindrome), and high denomination radars on $50 or $100 bills all attract stronger collector interest.
Radar Note Values by Currency
| Currency | Typical Value Range | Best Market |
|---|---|---|
| US Dollar ($1) | $5 - $75 | eBay.com |
| US Dollar ($100) | $75 - $300 | eBay, Heritage Auctions |
| British Pound | £15 - £150 | eBay.co.uk |
| Australian Dollar | A$20 - A$200 | eBay.com.au |
| Euro | EUR10 - EUR80 | eBay.com |
How to Sell a Radar Note
Search eBay completed listings for your specific denomination and pattern before pricing. Include a clear serial number photo, the series year, and an accurate condition description. Radar notes consistently attract multiple bidders when listed at a low opening price.
Check your serial number for free — our tool detects radars plus eight other fancy patterns in seconds.