{"id":66622,"date":"2025-06-18T04:29:22","date_gmt":"2025-06-18T04:29:22","guid":{"rendered":"https:\/\/quillbot.com\/blog\/?post_type=qa_faqs&p=66622"},"modified":"2025-08-19T19:35:04","modified_gmt":"2025-08-19T19:35:04","slug":"what-is-a-letter-subject-line","status":"publish","type":"qa_faqs","link":"https:\/\/quillbot.com\/blog\/frequently-asked-questions\/what-is-a-letter-subject-line\/","title":{"rendered":"What is a letter subject line?"},"content":{"rendered":"

A letter subject line<\/strong> is an optional line near the top of a formal letter that states the main subject of the letter.<\/p>\n

In the US, the subject line typically appears after the date but before the salutation, with a line of blank space before and after it.<\/p>\n

Subject lines often start with \u201cSubject:\u201d (e.g., \u201cSubject: Plumbing Awards 2025\u201d) or \u201cRE:\u201d for \u201cregarding\u201d (e.g., \u201cRE: Your table at the Plumbing Awards 2025\u201d).<\/p>\n

Use QuillBot’s letter maker<\/a> to generate letters with compelling subject lines.<\/p>\n","protected":false},"template":"","faq_category":[339],"class_list":{"0":"post-66622","1":"qa_faqs","2":"type-qa_faqs","3":"status-publish","5":"faq_category-professional-writing"},"acf":[],"yoast_head":"What is a letter subject line?<\/title>\n<meta name=\"description\" content=\"A letter subject line is an optional line near the top of a formal letter that states the main subject of the letter (e.g., \u201cRE: Your brochure request\u201d).\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/quillbot.com\/blog\/frequently-asked-questions\/what-is-a-letter-subject-line\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What is a letter subject line?\" \/>\n<meta property=\"og:description\" content=\"A letter subject line is an optional line near the top of a formal letter that states the main subject of the letter. 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