If you are looking for synonyms for the phrase "not credited," there are several different options available. Some of the most commonly used options include the phrases "unacknowledged," "unrecognized," "disregarded," and "ignored." These various synonyms can be used to describe situations where someone's work or contributions have not been properly recognized or acknowledged, either intentionally or unintentionally. Additionally, some other possible options might include phrases like "overlooked," "undervalued," "neglected," or "snubbed," depending on the specific context and circumstances in question. Ultimately, the choice of synonym will depend on the specific situation and what kind of tone or emphasis you want to convey.