The experiment with Co-Branding in card issuing, especially using Wallester's Co-Branding and Card Issuing, has been extremely positive. Brand perception improved markedly, becoming more attractive to customers through association with quality financial services. Customer engagement increased significantly, especially with personalized bonuses and perks on cards. Successful cases show that this strategy can significantly increase customer loyalty and drive engagement. Lessons learned include the need for careful partner selection, as well as constant updating of bonus programs to keep the offer attractive.