What type of letters do collections specialists send to patients with overdue accounts?

Collections specialists typically send collections letters to patients with overdue accounts as a primary method of communication regarding outstanding balances. These letters serve several important functions: they clearly state the amount owed, provide details on past due dates, and outline any necessary actions the patient should take to rectify the situation. Additionally, collections letters often include information about payment options and may indicate the potential consequences of failing to respond, such as further collection efforts or legal action.

While informational brochures provide general information, they do not specifically address overdue accounts, making them inappropriate for this situation. Legal notices might be sent later in the process when more formal action is considered, but they are not the first communication typically used for overdue accounts. Payment plan documents are related to offering arrangements to patients for settling their debt but are not the initial notification regarding their overdue status. Therefore, collections letters are the standard and appropriate communication method for dealing with overdue accounts, making this the correct answer.