Such companies may actually be in violation federal regulations. US Title 16 CFR § 700.7 covers this: https://www.law.cornell.edu/cfr/text/16/700.7 https://www.

Such companies may actually be in violation federal regulations. US Title 16 CFR § 700.7 covers this: https://www.law.cornell.edu/cfr/text/16/700.7 https://www.law.cornell.edu/cfr/text/16/700.7 So the manufacturer must honor the promised warranty, but they certainly have the option to offer an extended warranty at no charge provided that the consumer registers with them.