Contractor's license number must be displayed on all of the following except?

In the context of contractor licensing requirements, it is generally mandatory for contractors to display their license numbers prominently on various documents and materials that represent the business to clients and the public. This requirement is rooted in the need for transparency and consumer protection, ensuring that clients can easily verify the legitimacy and credentials of the contractor.

When it comes to displaying the license number, business cards, contracts, and advertisements are all standard mediums where this information is typically required. Including the license number on these materials helps affirm the contractor's qualifications and assures customers that they are engaging with a licensed professional.

However, bank financing agreements do not fall under the same obligation for displaying the contractor’s license number. These agreements are usually internal documents that relate to financial transactions and do not serve as representations to clients or the public. The main focus of these agreements is financial matters rather than the contractor's licensing status. Therefore, it is not necessary to display the contractor’s license number in this context, making this the correct answer.