The band will be playing in Portugal at the Altice arena in Lisbon on 16 and 17 September.
“Since February ASAE, through its National Information and Criminal Investigation Unit, has been carrying out an online ticket monitoring action aimed at combating speculation, conducted via various Internet advertising sites for the concerts of the Irish band U2, who are coming to Portugal in September”, the authority said in a statement.
The authority said a total of 26 tickets were seized, with original prices ranging from 37 euros to 200 euros and which were being traded for amounts ranging from 150 euros to 400 euros, allowing sellers to obtain profits of over 200 percent.
It further revealed that the defendants have already been brought before courts.
In Portugal it is a criminal offence to resell tickets online for prices above the original sale price, punishable with up to three years’ prison.