Over the years, I have learned that two seemingly identical pieces rarely tell exactly the same story.
Two shirts may belong to the same player, come from the same season and even be the exact same model. One may have been bought from a shop. Another may have been prepared specifically for a match. And a third may actually have been worn on the pitch.
At first glance, there may be very little to tell them apart.
To a collector, they are completely different pieces.
The same applies to footballs, boots and virtually any object connected to the history of the game. Understanding exactly what we are looking at, where it came from and what we can actually prove about it is precisely what separates an ordinary sporting object from a genuine piece of football memorabilia.
It is also one of the keys to understanding something I am often asked: why are certain pieces worth considerably more than others?
The answer rarely comes down to a single factor.
What Do We Really Mean by Football Memorabilia?
Football memorabilia can broadly be defined as objects connected to the history of the game that are preserved for their sporting, historical or collectible significance.
Shirts, footballs and boots are probably the most recognisable examples, but the field is much broader: tickets, match programmes, photographs, documents, equipment, signed items and countless other pieces associated with players, clubs, national teams and competitions.
The problem begins when we use all these terms as though they mean the same thing.
They do not.
An official shirt sold to the public can be a perfectly legitimate collectible. A shirt prepared specifically for a footballer is something different. And the fact that a shirt was prepared for a player does not necessarily mean that the player ever wore it.
This is where two familiar terms in specialist collecting come into play: Match Issued and Match Worn.
A Match Issued shirt has been prepared for a player for use in a competitive context. A Match Worn shirt, on the other hand, is attributed to actual use by the player.
It may sound like a minor difference in terminology.
It isn't.
In our collection, for example, we have a Match Issued Casemiro shirt from Real Madrid's 2020/21 season, bearing his number 14 and player specifications. It is catalogued as Match Issued because that is what the available evidence allows us to support.
This is one of the first principles I consider important in collecting: a piece should be described according to what we can prove, not according to what we would like to have happened.
So, What Makes a Piece Valuable?
This is a considerably more complicated question.
There is no universal table that can tell us what a shirt, football or pair of boots is worth simply by entering the player, year and competition.
Personally, I am wary of any valuation that attempts to simplify this market in that way.
After many years studying pieces, auctions and private sales, there are six elements to which I pay particular attention: authenticity, provenance, historical significance, rarity, condition and documentation.
What makes this particularly interesting is that these factors rarely operate independently.
An exceptional piece is often exceptional precisely because several of them come together.
Authenticity Begins with Knowing Exactly What We Are Claiming
Imagine a shirt whose manufacture, labels and characteristics correspond perfectly with those used by a particular team during a given season.
What have we proved?
That the shirt corresponds to that model.
Nothing more.
If we also claim that it was prepared for a specific player, we need further evidence. And if we go one step further and say that the player wore it in a particular match, the standard of evidence rises again.
That distinction is fundamental.
An interesting example is a Match Worn Gerard Piqué shirt from Barcelona's Champions League match against Olympiacos in 2017.
When examining the piece, photographs and video footage from the match were compared against various features of the shirt: the positioning of the sponsors, the club crest, manufacturer's logo, UEFA patches, squad number and player's name.
They are small details, but small details can contain important information.
This also brings us to photo matching, a technique used to compare a physical piece with images of the player during a match, looking for matching individual characteristics. It is a subject broad enough to deserve an article of its own, particularly because the term photo-match should not be used lightly either.
The important point is this: a shirt that is the same model as the one worn by a footballer is not necessarily the shirt that footballer actually wore.
It sounds obvious when written down.
In the market, it is not always treated that way.
Provenance Can Completely Change What We Know About a Piece
There is one question that inevitably arises when we study memorabilia:
Where did it come from?
In the international market, the term provenance is used constantly. Essentially, it means reconstructing the known history of a piece.
Who had it? How did they obtain it? Who did it pass from and to? What documentation exists? Which parts of that history can we substantiate and which cannot?
One example I particularly like is a Match Worn Carlos Tévez shirt from his time at Juventus, corresponding to the Catania–Juventus match during the 2013/14 season.
In this case, we know something fundamental about its provenance: after the match, the shirt was exchanged with Argentine footballer Pablo Álvarez.
That detail completely changes the nature of the information we have.
We are not simply dealing with someone who, years later, claims to own a shirt worn by Tévez. There is an earlier history that allows us to reconstruct how the piece left the player's immediate environment.
The more links in that history we can document, the stronger the chain of custody becomes.
That does not mean that a piece with gaps in its history is necessarily fake. It would be absurd to apply that standard to decades of football during which nobody imagined that a shirt might one day become a highly valuable collectible.
But it does mean that we need to distinguish clearly between what we know and what we assume.
A Shirt Is Worth More Than the Name on the Back
The player matters, of course.
So do the club, the national team and the era.
But there is another element that is sometimes overlooked: the moment.
A piece used in an ordinary league fixture does not necessarily carry the same historical significance as one connected to a final, a debut, a record, a World Cup or one of those matches that eventually becomes part of football's collective memory.
Even two shirts worn by the same player do not necessarily have the same significance.
A good example is a Lionel Messi shirt from the Argentina–Venezuela match played in Buenos Aires in September 2025.
Several elements come together here.
We have the player. We have a specific match with particular significance within his career with Argentina. We have the captaincy and the two goals he scored that night. And we also have documentation relating to the provenance and authentication of the piece.
Player, match, context and documentation.
It is precisely the combination of all these elements that makes it impossible to value memorabilia correctly simply by looking at a price list.
Rare Does Not Necessarily Mean Valuable
This is another point worth clarifying.
A piece can be extraordinarily difficult to find and still attract very little interest from collectors.
That is why rarity and value are not synonymous.
The same applies to age.
The fact that something is fifty years old does not automatically make it highly valuable. Hundreds of examples may still survive or, quite simply, there may not be enough demand.
For scarcity to have a meaningful impact on value, there also has to be someone on the other side who wants the piece.
In other words, it is not enough to ask:
How many exist?
We also need to ask:
How many people want one?
Those two answers do not always go hand in hand.
Signs of Use Are Not Always a Defect
Condition is another area where sports collecting has rules of its own.
Generally speaking, poor preservation can harm a piece: humidity, colour loss, deteriorated printing, improper storage, undocumented restoration or certain types of handling can seriously affect its condition.
But a Match Worn shirt has one obvious characteristic:
it has been worn.
Certain stains, scuffs or signs of wear may be entirely consistent with the history of the piece. In some circumstances, they may even provide useful information when identifying it.
Those traces of use need to be distinguished from damage that occurred later.
The Tévez shirt mentioned earlier is also a useful example here. For years it was not stored correctly and displays certain defects caused by having been kept folded together with other shirts.
A mark produced during a match is one thing.
Damage caused ten years later inside a wardrobe is something very different.
Both form part of the piece's present condition, but they tell different stories.
A Good Story Is No Substitute for Good Documentation
This is probably one of the aspects of collecting that interests me most.
Memorabilia lives through stories.
“This shirt was worn by…”
“This football was there when…”
“These boots belonged to…”
And some of those stories are extraordinary.
That is precisely why we need to be careful.
A story does not become evidence simply because it has been repeated many times.
Photographs, provenance documents, certificates, verifiable testimony, acquisition records, specialist analysis or a known chain of custody can all help us reconstruct the life of a piece more accurately.
In some cases, the level of documentation can be particularly extensive. The Messi shirt from Argentina–Venezuela 2025 mentioned earlier includes information about its chain of custody, additional documentation and analysis through photo matching.
Not every piece can or needs to have exactly the same documentary record.
A shirt from 1970 is unlikely to have the same documentary traceability as one from 2025.
The important point is something else:
we should not fill the gaps left by the documentation with certainties we do not have.
I apply this principle particularly carefully to footballs.
A football may correspond perfectly to the official model used in a competition. But if there is no clearly established chain of custody or sufficiently strong evidence linking it to the field of play, I would rather describe it as an official football than attribute match use that I cannot prove.
In thirty years of studying memorabilia, I have seen too many stories grow with every change of ownership.
And when a story grows faster than the evidence supporting it, it is time to stop.
So Why Can Two Seemingly Identical Pieces Be Worth Completely Different Amounts?
By this point, the answer becomes much simpler.
Because they probably aren't really identical.
They may share the same manufacturer, season, design and even player.
But one may have a fully documented provenance while the other does not.
One may come from a historic match.
Another from a fixture of little particular significance.
One may retain documentation tracing it back to the moment it left the dressing room.
Another may surface twenty years later accompanied only by a story passed down by word of mouth.
One may display characteristics that allow it to be linked to photographs from the match.
Another may simply correspond to the same model.
And both may still be authentic pieces.
That is why valuing memorabilia requires examining the specific piece itself, rather than simply looking up what someone paid for another item that appears similar.
What Should You Check Before Buying Football Memorabilia?
I do not place much faith in magic formulas, but there are a few questions every collector should ask.
What exactly is the seller claiming?
Is the piece described as official, player-prepared, Match Issued or Match Worn?
Where did it come from?
Is there supporting documentation?
Are the photographs detailed enough?
Are any alterations or restorations known?
If it is linked to a particular match, what evidence supports that attribution?
And probably the most important question of all:
Does the available evidence genuinely support everything the description claims?
There is nothing wrong with a piece having unanswered questions.
Football has spent more than a century producing objects that nobody thought to preserve, document or photograph with future collectors in mind.
The problem begins when we stop acknowledging those uncertainties.
Collecting Objects or Preserving History?
When I began collecting, many of the tools available to us today simply did not exist.
There was less information, fewer photographs available, fewer databases and, of course, far fewer opportunities to investigate and compare a piece from a computer.
That has changed.
But one thing remains exactly the same.
A match ends.
A shirt leaves the dressing room.
A football stops rolling.
A pair of boots is worn for the last time.
And sometimes, someone decides to preserve that object.
Years later, it may become the last physical witness to a small part of football history.
That is why I have always believed that collecting memorabilia means something more than simply accumulating pieces.
It means trying to understand what we have in front of us, what story it carries and how much of that story we are actually able to prove.
Because ultimately, the value of a great piece does not lie solely in the object itself.
It lies in everything we can tell — and substantiate — about it.
That is where football becomes legacy.