A back-up certificate for a prospective purchaser in a Rule 506(c) offering to deliver to a registered broker-dealer, registered investment adviser, licensed attorney, or certified public accountant. The certificate supports the purchaser's request for an accredited investor (AI) verification letter to be delivered to the issuer to assist it in taking "reasonable steps" under Rule 506(c) to verify the purchaser's AI status. This Standard Document has integrated notes with important explanations and drafting tips.