Regarding "Is Mailing Little Card Required for Warranty?" (For What It's Worth, Nov. 18), it is my understanding that the warranty return card has quite a different purpose than any set forth in your column.
As I understand it, unless a consumer buys a product with notice of a limited warranty, or unless he agrees in advance to a specific warranty, the product is purchased with the rather broad warranties provided by law.
In other words, every product is presumed to carry the warranties provided by law. Therefore, the only purpose of the return card is to have the consumer agree to the more limited warranty specified by the manufacturer.
For certain products, such as automobiles, it is rather difficult to make a purchase without agreeing in advance to the limited warranty. However, for most products, especially those that cost far less than an automobile, the consumer is not aware of the manufacturer's limited warranty prior to purchase. Consequently, he can take advantage of the broader legal warranties.