Rule 12(e) motions for a more definite statement are due before serving a responsive pleading. Therefore, they are due no more than twenty-one (21) days after the pleading to which they pertain is served. If no responsive pleading is due, Rule 12(e) motions for a more definite statement are not contemplated. Fed. R. Civ. P. 12(e).
Deadline for Rule 12(e) Motion for More Definite Statement in Federal Court
Enter the service date of the pleading to which the Rule 12(e) motion pertains
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A motion for more definite statement may be used in addition, or in the alternative, to a 12(b)(6) motion. A defendant may make a motion for a definite statement of a complaint to which an answer is allowed, but which is so vague or ambiguous that the defendant cannot reasonably prepare a response.