Final answer:
When a pt representative cannot confirm the patient's birthday, they should request additional identification or information to verify the patient's identity.
Step-by-step explanation:
When a patient representative cannot confirm the birthday of a patient but has verified the patient's full name and address, the correct response is to request additional identification or information that can help confirm the patient's identity. This could include asking for a social security number, driver's license, or any other relevant identification document. It is important to ensure the accuracy of patient information for proper medical record keeping and care.