From the group stage, only the approved and used shirt sponsors may appear on playing attire.
From the group stage, clubs may change each shirt 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.
Clubs which want to change shirt sponsors must submit their request to the UEFA administration at least seven working days prior to the first match in which they wish to use the new sponsor (together with the items defined in the UEFA Equipment Regulations).
Clubs that have qualified for the knockout stage must announce any sponsor change to the UEFA administration by 1 February 2022 (12.00 CET) at the latest. No change in sponsor is permitted after this time.