From the league phase, only the approved sponsors may appear on attire. In addition to the shirt and sleeve sponsors foreseen by Article 28 of the UEFA Equipment Regulations, a team may display one additional playing attire sponsor on the back of the shirt, below the player number as follows:
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The sponsor must be approved in advance by UEFA in accordance with Article 6 of the UEFA Equipment Regulations.
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The total area used for the back-of-shirt sponsor must not exceed 100cm2.
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The sponsor must have been approved beforehand by the club’s national association and be advertised on the playing shirt in at least one official domestic competition.
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The back-of-shirt sponsor may be used alone or in combination with a charity logo (maximum cumulative size of 100cm2).
From the league phase, clubs may change each attire sponsor only once during the same UEFA season.
Starting the competition without a sponsor but subsequently using one is not considered as a change of sponsor.
A change regarding the content of sponsor advertising is considered to be a change of sponsor, even if the sponsor remains the same.
If a club wants to change its attire sponsor, it must submit a request to the UEFA administration at least seven working days prior to the first match in which it wishes to use the new sponsor, accompanied by the items defined in the UEFA Equipment Regulations.
Clubs that have qualified for the knockout phase must announce any change of attire sponsor to the UEFA administration by 6 February 2026 (12:00 CET) at the latest. No change of sponsor is permitted after this time.