The starting price was £300,000 for the ‘standard Spanish waxy napkin’ which is 16.5 x 16.5cm and was laminated and framed.

The napkin, signed in blue ink in December 2000, carries a pledge from then Barcelona director Carles Rexach to sign Messi.

It was also signed by Josep Minguella, a transfer adviser to the Spanish club, and agent Horacio Gaggioli, who recommended the Argentine youngster.

The napkin in blue ink was offered in an online auction by London-based Bonhams on behalf of Gaggioli.

Messi joined Barca a month after the deal was agreed and went on to become their record goalscorer and many regard him as the greatest player of all time.

He made his first-team debut aged 16 and scored a record 672 goals in 778 games for the Catalan club.

Messi won 10 La Liga titles and the Champions League four times at Barcelona before leaving for Paris St-Germain in 2021 – and the 36-year-old World Cup winner now plays for Inter Miami.

The napkin was signed at a meeting arranged by Rexach, who invited Messi’s father Jorge to lunch after concerns from the Messi family about a lack of response from Barcelona following the teenager’s initial trial.

Translated into English, it reads: “In Barcelona, on 14 December 2000 and in the presence of Messrs Minguella and Horacio, Carles Rexach, FC Barcelona’s sporting director, hereby agrees, under his responsibility and regardless of any dissenting opinions, to sign the player Lionel Messi, provided that we keep to the amounts agreed upon.”

IMAGE SOURCE: REUTERS

Image caption: This napkin cost £762,400

Ian Ehling, head of fine books and manuscripts at Bonhams New York, said: “Since the sale was first announced it captured international attention and fans all over the world have anticipated this day.

“What a wonderful result for one of the most thrilling items I have ever handled. Yes, it’s a paper napkin, but it’s the famous napkin that was at the inception of Lionel Messi’s career.

“It changed the life of Messi, the future of FC Barcelona, and was instrumental in giving some of the most glorious moments of football to billions of fans around the globe.”

Bonhams said that “allegations concerning the ownership of the napkin were raised in March but have not been substantiated and appear from recent press comment to have been retracted”.

The auction house added: “The consignor of the napkin has received a legal opinion which confirms to them that they have clear title and the right to sell the napkin under Spanish law, and the seller gives a full warranty of title with the sale.”

The napkin, signed in December 2000, carries a commitment from then Barca director Carles Rexach to sign Messi.

It was also signed by Josep Minguella, a transfer advisor to the Spanish club, and agent Horacio Gaggioli, who recommended the Argentine.

Messi joined Barca a month later and went on to be their record goalscorer.

He made his debut aged 16 and scored 672 goals in 778 games for the Catalan club.

Now 36, Messi won 10 La Liga and four Champions League titles at Barcelona before leaving for Paris St-Germain in 2021.

The napkin was signed at a meeting arranged by Rexach, who invited Messi’s father Jorge to lunch after concerns from the Messi family about a lack of response from Barcelona following the teenager’s initial trial.

Written in blue ink, the agreement on the napkin reads: “In Barcelona, on 14 December 2000 and the presence of Messrs Minguella and Horacio, Carles Rexach, FC Barcelona’s sporting director, hereby agrees, under his responsibility and regardless of any dissenting opinions, to sign the player Lionel Messi, provided that we keep to the amounts agreed upon.”

The napkin will go under the hammer via British auction house Bonhams in March.

Head of fine books and manuscripts at Bonhams Ian Ehling said: “This is one of the most thrilling items I have ever handled.

“Yes, it’s a paper napkin, but it’s the famous napkin that was at the inception of Lionel Messi’s career.

“It changed the life of Messi, the future of FC Barcelona, and was instrumental in giving some of the most glorious moments of football to billions of fans around the globe.”