SIE FINRA Securities Industry Essentials Exam (SIE) Free Practice Exam Questions (2026 Updated)

A registered representative may not sign a customer’s name or apply a customer’s digital signature on the customer’s behalf, even if the customer verbally agreed to the transaction or previously provided identifying information. Choice C is correct because the prohibited conduct is the representative’s act of signing for the customer. The issue is not whether the form is internal, whether the investment is suitable, or whether the authentication information was accurate. Customer signatures evidence customer review, consent, and acknowledgment. Allowing a representative to sign for the customer undermines books and records integrity and creates a false record. Choice A is incorrect because internal firm documents still must be accurate and authentic. Choice B is incorrect because possessing authentication information does not authorize the representative to impersonate the customer. Choice D is too narrow; the action would be impermissible even if the authentication information were current. The SIE outline includes falsifying or withholding documents, signatures of convenience, books and records, suitability, and prohibited activities related to account documentation. This falls directly under improper maintenance of records and falsification concerns. Reference: Understanding Trading, Customer Accounts and Prohibited Activities; Prohibited Activities; Falsifying Documents; Books and Records.