Yes, but the challenge is rarely a direct attack on the complaint itself. An informal complaint, meaning a verbal report, an email, an anonymous tip, or a routine command observation, is just a trigger for inquiry. It is not evidence of guilt, and it is not what a court-martial tries. The meaningful challenges target the steps that come after the complaint: whether the command followed the required disposition process, whether the charges rest on probable cause and admissible evidence, and whether the way the case was handled introduced unlawful influence or bias. To see where the leverage is, it helps to map how a complaint becomes a referred charge.
How an informal complaint fits into the process
Nothing in military justice requires that a case begin with a formal, sworn document. Under Rule for Courts-Martial (RCM) 303, when a commander receives information that a member may have committed an offense, the commander must make or cause a preliminary inquiry into the matter. That information can be entirely informal. The inquiry is meant to gather facts so the command can decide what to do.
What follows is a sequence of distinct, regulated decisions. Charges are formally preferred under RCM 307, which requires a charge sheet signed under oath by an accuser before a commissioned officer authorized to administer oaths. Disposition decisions are governed by RCM 306 and the related rules, which give commanders discretion over whether and how to proceed. For a general court-martial, an Article 32 preliminary hearing ordinarily must occur after preferral, and under Article 34 the convening authority must receive legal advice from the staff judge advocate before referral. Referral itself, under RCM 601, is the convening authority’s order that specified charges be tried by a specified court-martial.
The informal complaint sits only at the very front of that chain. Everything that gives the case legal weight happens in the steps that follow.
Why “the complaint was informal” is not, by itself, a winning argument
Because the complaint is merely a trigger, the fact that it was informal is generally not a basis to dismiss. The system expressly contemplates that inquiries begin from informal information. A member who argues simply that the case should be thrown out because it started with an unsworn or anonymous report will usually lose, since the law does not require a formal origin for an investigation or for the eventual sworn preferral.
The …