From the league phase, only the approved sponsors may appear on attire.
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 2025 (12:00 CET) at the latest. No change of sponsor is permitted after this time.