I think the program you signed the contract with will report it to the match committee, and there will be an investigation of the matter which could result in your losing the residency spot. Or at least that's what I interpreted from the NRMP's legal mumbo-jumbo on their website:
I've signed a contract outside the Matching Program. What happens now?
Under the terms of the
Match Participation Agreement, an independent applicant who accepts a concurrent year position outside the Matching Program or through another national matching service must withdraw from the Matching Program. Withdrawal must be completed prior to the r
ank order list deadline. Failure to do so is a violation of the Match Agreement, which will be investigated by the NRMP in accordance with the
Policies and Procedures for the Reporting, Investigation, and Disposition of Violations of NRMP Agreements. Independent applicants who elect to participate in the match are prohibited from discussing, interviewing for, accepting a concurrent year position outside the Matching Program or through another national matching service after the rank order list deadline.
What is the process if I'm investigated for a violation of the Match Participation Agreement?
Subsequent to receiving a written report of an alleged violation, the NRMP will solicit information from the applicant and any other individuals with knowledge of the situation. A Preliminary Report that documents the nature of the allegation is prepared.
If the results of the investigation indicate that a violation has not occurred, the case will be closed and all parties will be so notified.
If the results of the investigation indicate a violation has occurred, the Preliminary Report will be distributed to the subject of the investigation, the individual who reported the violation, and any other parties who provided information material to the investigation for their review and to correct the additional information provided to the NRMP.
The Preliminary Report will be reviewed by a Review Panel of the NRMP's Violations Review Committee, which will make the final determination of whether a violation occurred and, if so, the appropriate penalty. A Review Panel Report will be issued to the subject of the violation, who will have ten business days to notify the NRMP of the intent to initiate arbitration. If the subject of the violation initiates arbitration, the NRMP will note in the Registration, Ranking, and Results (R3) System that the party is the subject of a "pending action". That designation will remain in place for the duration of the arbitration process. In addition, if the subject of the violation initiates arbitration, he/she has thirty days from receipt of the Review Panel Report to file with the American Arbitration Association. If the subject of the violation does not request arbitration within ten business days, the Review Panel Report will become the Final Report, and it will be issued to all parties listed on the Report. All Match registrants should review carefully
The Policies and Procedures for the Reporting, Investigation, and Disposition of Violations of NRMP Agreements.
What does it mean in the R3 System when it states that an institution or program is the subject of "pending action"?
When a violation investigation of an institution or program results in an adverse decision and the adverse action is contested, the institution or program is designated with "pending action" in the R3 System. The designation remains in place until the institution or program has waived or exhausted the opportunity to contest the action pursuant to the
Violations Policy. Once the Final Report of the investigation has been issued, the program will be listed on the Institution and Program Violations Report if the NRMP concluded that there was a breach of the
Match Participation Agreement.