The humble thank you letter is an underrated part of personal and business correspondence. The right letter can turn a critic into a brand advocate and create dedicated lifelong fans for your business. But with so much junk filling up our customer’s mailboxes, it can be a challenge just to get noticed, let alone taken seriously, which is the whole point of a thank you letter. Thankfully, engraved business stationery exudes a warmth and dignity makes it easy to send your customers thank you letters that they will actually take seriously.…