Final answer:
Letters from satisfied customers, or testimonials, are effective sales tools as they provide social proof and can persuade potential customers. Follow-ups should be persistent and courteous, ensuring the product or service offered meets the customer's needs.
Step-by-step explanation:
The question asks whether letters from satisfied customers are ineffective as sales tools, to which the answer is false. These letters, often referred to as testimonials, can be very effective. They provide social proof, which is persuasive to potential customers because it shows that others have had positive experiences with the product or service. While it is true that many recipients may not respond to email campaigns, the ones who do can provide valuable feedback or endorsements.
When using testimonials or following up with potential customers, it is important to be persistent yet courteous. Customers are more likely to be receptive if you are offering them something they need. Additionally, making sure your mailing lists are complete and addressing issues such as uncertain respondent identity can help improve the effectiveness of your sales and marketing strategies.