Nextbike, a city bike rental operator, was penalized by the President of the Office of Competition and Consumer Protection (UOKiK) for violating consumer rights. The company was found to have implemented abusive clauses in its regulations, unlawfully altered terms, and unjustly imposed extra charges on consumers. This case highlights the importance of complying with consumer protection laws and avoiding unfair practices in the rental services sector. The penalty serves as a warning to other businesses to review their terms and conditions to ensure they are fair and transparent to consumers.