Final answer:
Generally, it is true that a salesperson must produce their registration certificate for inspection if a customer asks to see it, to confirm their qualifications and authority.
Step-by-step explanation:
The question addresses the requirements of a salesperson with regards to producing their registration certificate for a customer upon request. The statement is generally True; salespeople, particularly in regulated industries, might be required to show their registration or licensing credentials to a customer if asked. This is to ensure that they are qualified and authorized to conduct sales and to provide a level of transparency and trust in the transaction. However, the requirement can vary depending on the laws of a specific state or country, and the specific industry regulations. For example, real estate agents, insurance agents, and financial advisors often must present their registration or licensure when conducting business.