Discover the best birthday wishes for an acquaintance to help you express warm, friendly sentiments without overstepping boundaries. This guide offers a curated selection of short, polite, and genuine birthday messages designed for colleagues, business contacts, neighbors, or casual friends. Find inspiration for thoughtful words that convey respect and care, making your birthday greetings both memorable and appropriate. Explore various usage scenarios, such as sending a quick text, jotting a note in a card, or composing an email, to make your wishes suit every occasion. Save time with ready-to-use templates and tips that ensure your birthday greetings are perfect for acquaintances with whom you want to maintain a cordial and positive relationship.