A think a thank you for a larger favor rarely elicits a simple you're welcome in response. Rather, after donating a kidney, one would probably gush on about how this person is an important part of their life and they couldn't bear to stand by whilst they were dying, and so-on. In short: You're welcome to accept this as the correct answer. However, many a time, all you have is online/email interface for expression. And words are all you can use. So my question (s) is (are): Is there a superlative form of Thank You which one can make use of in such cases? Will you advice using the same during face-to-face (or voice)? Which is the highest degree of gratitude you have seen/expressed? When writing a thank you note from a husband and wife, is it correct to write the note as. Thank you for inviting Steve and me to your home for the birthday celebration. Or is it, Thank y. I don't think you'll have any issues with any of these replies in normal conversation, so I wouldn't let it concern you. There is a relatively new study that claims people who say things such as no problem in reply to thank you, are essentially saying that the thanker's issue was somehow beneath the responder, but I doubt if anyone actually feels like that. It's all a big to-do about. Thank you is a sentence. If you want to use one word, thanks is acceptable. However, thankyou is not acceptable as a single word. Will it be okay if I write or say like this: I thank you. When I saw someone write I thank you , I said that usage is a bit awkward and rarely used. I just want to know your opinion. While wanting to properly close a question and thank its participants on one of Stack Exchange's other sites-the question had resolved itself–I started wondering if Thanks regardless is a proper way to end such a note. I often hear Sure in response when I say Thank you or Thanks to someone. I don't know — is this correct usage? If it is considered good, I'll use it someday. I have observed a growing trend in which people substitute no problem for you're welcome as a response to thank you. In particular, it seems to be an increasingly common response from server. What is happening to the phrase Thank you ? Related questions: Is thank you considered formal nowadays? Is thanks used more often? Is there a decline in the usage of the phrase thank you observable among different generations, classes, regions or countries?.