I'm not a lawyer and not sure of the specifics of this company and you certainly know more than me, so I'm
not trying to call you a liar or misleading or anything like that. But I had to chime in that in
most cases those cards are optional. And privacy advocates say those cards are just to collect personal information for the purposes of marketing and selling to 3rd parties. And this cynic says maybe they are also to weasel out of a warranty/deter claims from people who didn't fill them out because they
believe they are void. The manufacturer may
imply that you need to fill them out to get the warranty, and may have implied that to you as well, but refusing to honor a warranty is often/usually illegal -- federally since 1975 for all full warranties, I'm not sure about limited warranties, and there may be state laws preventing it for all warranties as well. David's state of CT is one of at least 11 that even bans selling products "as is" to avoid warranties, so it seems to have strong consumer protection laws on the matter
https://www.upcounsel.com/warranty-laws-by-state
The warranty card I found on Regency's website says:
(The emphasis is mine.) So they are not saying it's required, but they would like your personal info anyway.
In fairness to Regency, they did not ask for any blatant marketing demographic info like personal income or household members. However, they can still sell your name, address, phone number, email, and the fact that you live in a house with chimney(s) and one or more of their products, from which advertisers can infer more personal info.
[See also: "warranty void if removed" stickers on electronics. Nope, 100% illegal, and have been since the Gerald Ford administration. But if you're still worried, you can heat those stickers with a hairdryer and slide them out of the way, then back again.]
Some experts discourage consumers from returning completed warranty cards, charging that companies use them to build huge advertising databases; federal law makes it possible for companies to require registration, but such demands are rare (M)
www.nytimes.com
Should you fill out and send in those registration cards found with new products? Consumer Reports experts weigh in with what information you should provide manufactures when you've bought their latest product.
www.consumerreports.org
Under certain circumstances, especially when the consumer has used a product for something other than its intended purpose, a merchant may choose not to honor the terms of a warranty by declaring it void. But sometimes merchants may attempt to void a warranty
www.findlaw.com