When sending notifications, it's important to use language that is clear and concise. Instead of repeatedly using the phrase "hereby we notify you of," there are a few different phrases you can use to convey the same message. Some synonyms include: "we wish to inform you that," "please be advised that," "this is to let you know that," or "we would like to alert you to the fact that." Using these phrases in place of "hereby we notify you of" can make your notifications more professional and easier to read.