Proof banknote auctions: printer's proofs, searched at once

Proof notes, trial or archival impressions pulled by the printer before a design entered general production, are amongst the rarest paper money collectables in existence, often unique or limited to a handful of surviving examples, and can appear uniface, without serial numbers, or in unissued colour trials. Certified examples from major grading services command particularly strong premiums.

Why proof note lots get missed

Because proofs never circulated and rarely match the format collectors expect from a normal note, they're easy for a general seller to misdescribe entirely, or to bundle into a mixed "presentation set" lot alongside modern commemorative coins, obscuring a genuinely rare piece of printing history.

One search across every platform: including a numismatic specialist

Auction Bid Assistant's free browser extension searches the-saleroom, EasyLive, Bidspotter, Invaluable, NumisBids, iCollector and LiveAuctionWorld simultaneously, alongside eBay. NumisBids is itself a platform dedicated entirely to coin and banknote auctions worldwide, so a single search here already reaches specialist numismatic sales as well as the general auction houses where mis-catalogued lots hide. Search "proof note," "printer's proof," a bank name or "die proof" and results return across all of them, with images, estimates, current bids where shown, and sale countdowns, sorted by platform in tabs.

Real results for "proof note": from an 18th-century PCGS-certified Massachusetts proof note to modern proof banknote and coin presentation sets, found in one search.

It works by searching from inside your own browser, the same as opening and searching each site yourself, just done in seconds. Nothing is stored on our servers, permissions are minimal, and the extension never places a bid on your behalf.

Alerts: for lots that may only ever appear once

Because many proofs are unique or near-unique, save a search ("proof note," a bank name, or "printer's proof") and get emailed the moment a new lot matches it, across all covered platforms including eBay and NumisBids, rather than relying on remembering to check each one.

Want to try before installing?

The same search box works on this website with no install at all for eBay, iCollector, LiveAuctionWorld and Featured Auction catalogues, a quick way to see matching proof note lots before adding the rest of the platforms via the extension.

Built for how proof note collectors actually work

Save any lot with one click from search results, export your shortlist as a printable PDF or CSV before a sale, and on the day itself the optional live bridge feeds the auctioneer's asking price into the free bid calculator, so your maximum (with buyer's premium and VAT included) is always in front of you.

Common questions