Casino Credit Application, experience safety, convenience, and savings when you use Casino Credit to play at Seneca Casinos. Casino Credit is a service offered to players on a convenient and personal level and allows you the peace of mind. 2442. We are happy to discuss any and all questions you may have regarding your application for casino credit. While on property feel free to contact a Casino Host or Player Development Executive, or visit the Credit Office to. The Credit Office is located on the Seneca Niagara Casino gaming floor near the Main Cage Cashier. All Casino Credit subject to approval by the Credit Department. To apply, download our Casino Credit Form and return it via regular mail or fax. Mail to: Seneca Casinos, attn: credit department 310 Fourth Street, niagara Falls, NY 14303. Fax to: (716) 501-2777, seneca Casinos, attn: credit department, questions. It can eliminate or reduce the expense of using credit or debit card machines and once approved, Casino Credit offers you access to gaming funds which can be used at our Table Games and in our Slot Areas.