Massachusetts has introduced a first-of-its-kind sports betting regulation that requires licensed sportsbooks to explain why they place restrictions on customer accounts. The measure, which took effect on June 1, establishes new disclosure requirements for operators and gives bettors greater visibility into decisions that have traditionally remained undisclosed.
Under the regulation, sportsbooks must notify customers within 48 hours whenever an account is limited. Operators must also provide a clear and individualized explanation for the action. State regulators have stated that generic responses will not satisfy the requirement and may attract additional scrutiny.
The rule applies beyond newly imposed restrictions. Sportsbooks must also contact Massachusetts bettors whose accounts were limited before June 1. Customers who received account restrictions while wagering in another state and later placed bets in Massachusetts fall under the regulation as well.
New Transparency Requirements Take Effect
The Massachusetts Gaming Commission approved the regulation in December 2025 following a lengthy review of sportsbook practices. Since implementation began, bettors have shared notification messages on social media, offering insight into the reasons operators provide when limiting accounts.
Several notices cite wagering behavior that sportsbooks consider advantageous. References to perceived market inefficiencies have appeared in some communications. DraftKings has used explanations that include “live market latency exploitation” and “structured wagering” when notifying affected customers. Fanatics has also started issuing notices to users covered by the rule.
Before the regulation took effect, sportsbooks could significantly reduce betting limits without offering any explanation. Restrictions could include lowering wager amounts, limiting access to certain betting markets or imposing broader account limitations.
Years of Regulatory Review Led to Change
The policy emerged from discussions that began in July 2023 when the Massachusetts Gaming Commission started examining whether sportsbooks were unfairly restricting bettors who consistently generated profits.
Regulators held a roundtable on the issue in May 2024, although no sportsbook operators attended that meeting. A second session took place in September 2024, with representatives from all licensed sportsbooks participating in discussions.
During those proceedings, operators supplied data showing that only 0.64% of customer accounts were subject to restrictions. The same information indicated that bettors with stronger-than-average winning records faced a greater likelihood of having limits placed on their accounts.
The commission reviewed notification procedures submitted by licensed sportsbooks before implementing the new requirements and provided guidance on how operators should communicate account restrictions.
Focus on Accountability for Operators
Sportsbooks have argued that account limitations form part of their risk management practices. Operators often monitor betting patterns and may restrict customers they believe pose a financial risk due to consistent success or specific wagering strategies.
Massachusetts regulators have focused on increasing accountability by requiring sportsbooks to disclose the reasons behind those decisions. The state has become the first US jurisdiction to mandate individualized explanations when limits are imposed.
Major operators active in the market, including FanDuel, DraftKings and Fanatics Sportsbook, have confirmed compliance with the new requirements.
The regulation represents the latest step in Massachusetts’ oversight of the sports betting industry and establishes a transparency standard that has not yet been adopted elsewhere in the United States.
Source:
“Massachusetts first to require sportsbooks to justify account limits on winning bettors”, gamingintelligence.com, Jun 4, 2026
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