The development of e-commerce has not only had positive impacts but has also posed specific challenges, especially in the logistics sector. This research focuses on the alleged monopoly practices conducted by the e-commerce platform Shopee in providing shipping service options by offering a “recommended courier” option for certain shipping services, namely J&T Express and SPX, which are automatically activated on the Seller's dashboard with the justification that these two companies provide good service performance, thus leading to discriminatory practices. The main issues in this research are, first, how the changes in the algorithmic service system regulations for shipping services made by Shopee prioritizing J&T Express and SPX can be considered actions that violate Law No. 5 of 1999 concerning the Prohibition of Monopolistic Practices and Unfair Business Competition, and second, how the resolution of the monopolistic practices by PT. Shopee International Indonesia that prioritizes J&T Express and SPX in relation to the provision of shipping services on the Shopee platform can be addressed by the Business Competition Supervisory Commission. The method used in this research is normative legal research, employing legal principles and legal systematics that produce descriptive qualitative research. The findings indicate that Shopee has been proven to engage in alleged monopolistic practices as referred to in Article 19 letter d and Article 25 paragraph 1 letter (a) of Law No. 5 of 1999 concerning the Prohibition of Monopolistic Practices and Unfair Business Competition in the provision of shipping services by prioritizing J&T Express and SPX on its platform. The resolution of the monopolistic practices conducted by Shopee results from the initiative of the Business Competition Supervisory Commission summoning Shopee in a hearing, and Shopee has submitted a request for behavioral change approved by the KPPU Assembly, with supervision of behavioral changes for 90 (ninety) days. A decree was issued by the KPPU dated November 7, 2024, stating that PT Shopee International Indonesia has implemented the Integrity Pact for Behavioral Change in Case No. 04/KPPU-I/2024 concerning Allegations of Violations of Article 19 letter d and Article 25 paragraph (1) letter a of Law No. 5 of 1999 concerning the Prohibition of Monopolistic Practices and Unfair Business Competition related to Courier Services on the Shopee platform, thus this issue has been closed. However, in practice, this has not yet been fully implemented.