Conn. Gen. Stat. § 12-864a: Voiding sports wagers.

(a) For purposes of this section:

(1) “House rules” means the terms and conditions for sports wagering; and

(2) “Internal controls” means the written system of administrative and accounting processes and procedures implemented or anticipated to be implemented at a master wagering licensee or online gaming operator that are designed to ensure compliance with this chapter and the regulations promulgated hereunder, including, but not limited to, (A) financial reporting, (B) effectiveness and security of operations, (C) “know your customer” procedures, and (D) deterring fraud and anti-money laundering.

(b) (1) (A) An online gaming operator may void any sports wagers that the online gaming operator has accepted from patrons, without obtaining prior approval from the department, if:

(i) The sporting event for which such wagers were accepted has been cancelled, delayed for more than twenty-four hours beyond the originally scheduled start time of such sporting event or transferred to another venue;

(ii) Such wagers were accepted on sporting event players that take no part in the sporting event;

(iii) Such wagers were accepted for an act, or set of acts, to be performed during a sporting event and such act, or set of acts, does not occur;

(iv) Such wagers were accepted based on a specific team qualifying to participate in a post-season tournament and a reduction has been made in the number of teams that are allowed to participate in such tournament; or

(v) Such wagers were accepted on a sporting event and (I) there has been a change in the format of, or the number of participants scheduled to participate in, a phase of the sporting event, or (II) a phase of the sporting event is no longer scheduled to occur.

(B) For all sports wagers voided under subparagraph (A) of this subdivision, the online gaming operator shall reflect such voidance in the patrons' online gaming accounts and promptly credit the funds from such voided wagers to such patrons' online gaming accounts.

(C) Each sports wagering retailer shall post and maintain a notice that informs patrons how to determine whether a sports wager has been voided subject to the house rules and how to receive a refund for a voided sports wager. Such notice shall be (i) in a form and manner approved by the commissioner, (ii) at least eight and one-half inches by eleven inches in size, (iii) in at least twenty-point font, and (iv) posted and maintained at any location in such sports wagering retailer's facility or facilities where a patron may place a sports wager.

(2) An online gaming operator shall modify or void a sports wager that the online gaming operator has accepted from a patron, without obtaining prior approval from the department, if:

(A) The patron requests that the online gaming operator modify or void such wager prior to the sporting event for which such wager was accepted; and

(B) (i) The online gaming operator, or the electronic wagering platform operated by the online gaming operator, erroneously communicated the type, amount or parameters of such wager to the patron, or (ii) an employee of a sports wagering retailer committed an error in entering such wager into the electronic wagering platform operated by the online gaming operator.

(3) Each online gaming operator shall maintain a change log record of all sports wagers that such online gaming operator voids or modifies pursuant to subdivision (1) or (2) of this subsection. Such record shall be maintained in a form and manner prescribed by the commissioner. For each such wager, such record shall, at a minimum, include the following information:

(A) The name of the affected patron, unless the wager was placed at a retail sports wagering facility;

(B) The reason the online gaming operator voided or modified such wager;

(C) The type of such wager, broken down by market;

(D) The sporting event associated with such wager and the date or dates on which such sporting event occurred or was scheduled to occur; and

(E) Any other information the commissioner, in the commissioner's discretion, requires to properly identify and assess the impact of such voided or modified wager.

(c) (1) If an online gaming operator may not void a specific sports wager under subsection (b) of this section, the online gaming operator may submit a written request to the department, in a form and manner prescribed by the commissioner, to void such wager. Such request shall, at a minimum, include the following information:

(A) The reason for such request;

(B) The name of each patron who would be affected by voiding such wager, unless the wager was placed at a retail sports wagering facility;

(C) The sporting event associated with such wager and the date or dates on which the sporting event occurred or was scheduled to occur;

(D) The type of such wager;

(E) The total amount of such wager; and

(F) The online gaming operator's plan to contact the patrons who would be affected by voiding such wager, unless such wager was placed at a retail sports wagering facility.

(2) Upon receiving a written request submitted under subdivision (1) of this subsection, the department may request, and the online gaming operator shall disclose to the department, any additional information the department requires in order to review such request and assess the potential impact that granting such request would have on the affected patrons and the integrity of gaming.

(3) No online gaming operator that submits a request to the department under subdivision (1) of this subsection shall void any sports wager that is the subject of the request unless the department has issued a written notice to the online gaming operator, in a form and manner prescribed by the commissioner, approving such request.

(d) (1) Not later than September 1, 2025, each online gaming operator shall submit to the department, in a form and manner prescribed by the commissioner, such online gaming operator's internal controls concerning voiding sports wagers and allocating patron funds. The department shall review such internal controls to ensure that such internal controls (A) provide for affected patrons to be notified not later than twenty-four hours after the department approves a request to void any sports wager, regardless of whether such wager was placed online or at a sports wagering retailer facility, (B) provide for the prompt return of patron funds after the online gaming operator or sports wagering retailer voids any sports wager, and (C) address any other matter the commissioner, in the commissioner's discretion, determines is integral to preserving the integrity of gaming. Not later than December 1, 2025, the department shall send notice to each online gaming operator disclosing whether the department has approved or disapproved the internal controls such online gaming operator submitted to the department pursuant to this subdivision.

(2) If the department approves an online gaming operator's internal controls pursuant to subdivision (1) of this subsection, the online gaming operator shall include such internal controls in the online gaming operator's house rules, and the online gaming operator shall display such house rules in a clear and conspicuous location on the electronic wagering platform operated by the online gaming operator.