Under Federal Rule of Civil Procedure 37(a)(4), evasive or incomplete discovery responses are treated the same as no response at all. That single sentence is the reason you have leverage. A party who buries you in boilerplate objections, answers a question you didn’t ask, or claims not to know something sitting in their own files gets no credit for having responded. You can meet and confer, move to compel, recover your fees, and, if the stalling continues, ask the court for sanctions that can decide the case.
What Makes a Response Evasive or Incomplete
Evasion has a few recognizable shapes. The most common is the boilerplate objection: a response that a request is “vague, overly broad, or unduly burdensome” with no explanation of why. Courts treat unsupported objections like these as meaningless. If the responding party claims burden, the court expects a specific account of what makes it burdensome, not a generic phrase copied from a form book.
A subtler tactic is answering a narrower question than the one you asked. The response discloses some tangentially related information while hiding the facts that matter. This shows up often in interrogatory answers, where the writer produces technically accurate statements that dodge the substance.
Then there is claimed ignorance. If someone says they don’t know the answer, but the information sits in their own files, that is an incomplete response. A responding party has to make a reasonable effort to find the information before saying it doesn’t exist. Skipping that effort and writing “unknown” is treated the same as refusing to answer.
Interrogatory answers also carry a technical requirement that trips people up. Each answer must be provided in writing under oath, and the person answering must sign the responses. The attorney handling objections must separately sign those objections. An unsigned set of interrogatory answers is legally incomplete no matter how thorough the substance looks.
Why “Evasive Equals No Response” Matters
Rule 37(a)(4) is blunt: “an evasive or incomplete disclosure, answer, or response must be treated as a failure to disclose, answer, or respond.” There is no partial credit. A judge on a motion to compel does not ask whether the responding party tried, or whether the response contains some useful information. The question is whether it fully and directly addresses what was asked. If it does not, it is legally equivalent to silence.
That equivalence exists so discovery does not collapse into a loop of half-answers and clarification requests. Without it, a party could stall for months by filing technically responsive documents that carry no real information. By equating evasion with nonresponse, the rule gives you immediate access to the enforcement tools in Rule 37 without needing to prove the other side acted in bad faith.
Legitimate Objections vs. Evasion
Not every incomplete response is evasion. The Federal Rules limit discovery to information relevant to a claim or defense and proportional to the needs of the case. Courts weigh the importance of the issues, the amount in controversy, the parties’ relative access to the information, each side’s resources, the importance of the discovery in resolving the case, and whether the burden outweighs the likely benefit.
A responding party who legitimately objects that a request is disproportionate is not being evasive. The line is specificity. A response that says “this request is unduly burdensome because it asks for 15 years of transaction records across 40 subsidiaries when the dispute involves a single contract from 2024” gives the court something to evaluate. “Objection: unduly burdensome,” standing alone, does not.
Privilege Log Failures
Withholding documents on privilege grounds requires more than the word “privileged.” The responding party must expressly state the privilege claimed and describe the withheld materials in enough detail that you can assess whether the claim is legitimate, without revealing the protected content itself. That description is the privilege log.
A log that omits required details, or a response that stamps “privileged” across a category of documents with no further explanation, is incomplete under the same standard that governs other evasive responses. Courts have generally held that failing to produce a timely, detailed privilege log can waive the privilege entirely, though outcomes depend on whether the delay caused actual prejudice.
Meet and Confer Before You File
Before asking the court for help, you have to try to work it out. Rule 37(a)(1) requires any motion to compel to include a certification that the moving party made a good-faith effort to obtain the discovery without court involvement. Filing without this certification is grounds for denial on procedural grounds alone.
Judges want to see that real conversations happened. Your certification should identify specific dates, the method of communication, the particular requests discussed, and why the parties could not agree. A vague statement that “the parties were unable to resolve the dispute” will not satisfy a judge who wants to know that both sides actually engaged with the substance.
The process also creates a record. If the responding party refused to move despite a reasonable proposal, those details strengthen your motion. If you never raised the specific deficiencies you are now presenting to the court, that undercuts your argument that the other side was uncooperative.
Filing the Motion to Compel
A motion to compel under Rule 37(a)(3)(B) covers four categories of failure: a deponent who will not answer at a deposition, a corporation that fails to designate a witness, a party that will not answer interrogatories, and a party that will not produce documents or permit inspection. Your motion needs to identify which category applies and lay out the specific deficiencies.
You carry the initial burden. Show the court exactly what was asked, exactly what was answered, and why the answer falls short. Attach the original requests and the responses, and walk the court through each inadequate answer. Some districts require a separate statement or chart pairing each disputed request with its response and an explanation of the deficiency. Even where not required, that side-by-side format is far more persuasive than a narrative brief that forces the judge to flip between exhibits.
Watch your local deadline. Federal courts do not impose a single national deadline for filing a motion to compel after an inadequate response. Each district sets its own timeline through local rules or the scheduling order. Some require a motion within 30 days of the deficient response; others are more flexible. Missing a local deadline can forfeit the challenge entirely, so check the applicable rules early.
Once the motion is served, the court typically sets a briefing schedule. The responding party gets a chance to file an opposition. The judge may decide on the papers alone or set a hearing. If the court agrees the responses were evasive or incomplete, it will order full answers by a specific deadline.
Fees and the Three Exceptions
When the court grants your motion, Rule 37(a)(5)(A) requires the losing party or their attorney to pay your reasonable expenses, including attorney’s fees. This is not discretionary in the default case. The word “must” controls. The court is required to award fees unless one of three exceptions applies.
First, no fees if you filed the motion before genuinely trying to resolve the dispute without court help. Second, no fees if the responding party’s position was substantially justified. Third, no fees where other circumstances would make the award unjust.
Substantial justification does not mean the responding party was right. It means the dispute was genuine and reasonable people could have disagreed about whether the response was adequate. The advisory committee notes describe it as a dispute that is “genuine, though ultimately resolved one way or the other by the court.” The standard deters unnecessary court fights, not close calls that happen to lose.
What Happens If the Court Order Is Ignored
This is where a discovery dispute becomes genuinely dangerous for the party stalling. If a party disobeys an order compelling discovery, Rule 37(b)(2)(A) authorizes sanctions that can end the case. The court may:
- Direct that specific facts be taken as established in favor of the party who sought discovery.
- Prohibit the disobedient party from supporting or opposing particular claims or from introducing certain evidence.
- Strike part or all of the offending party’s pleadings.
- Stay proceedings until the party complies.
- Dismiss the case entirely or enter default judgment against the disobedient party.
- Treat the failure as contempt of court.
On top of any of these, the court must also order the disobedient party and their attorney to pay the reasonable expenses caused by the failure, unless the noncompliance was substantially justified or an award would be unjust. The path from an evasive response to a default judgment is shorter than most parties realize.
Lost or Destroyed Electronic Evidence
Disputes over electronic evidence follow a separate enforcement track under Rule 37(e). When electronically stored information is lost because a party failed to take reasonable steps to preserve it, and the information cannot be recovered through other means, the court can act at two levels.
If the loss prejudices the other party, the court may order measures to cure the prejudice, but nothing more severe than necessary. If the party destroyed the evidence with the intent to deprive the other side of its use, the court has far broader power. It can instruct the jury to presume the lost information was unfavorable to the party who destroyed it, or it can dismiss the case or enter default judgment.
The intent requirement is the critical line. Negligent or even reckless failure to preserve electronic evidence does not open the door to an adverse inference instruction or case dismissal. The requesting party has to show the destruction was deliberate and aimed at keeping the evidence out of the litigation. Courts have also awarded attorney’s fees for the cost of bringing the preservation dispute forward, even where the harsher sanctions were not warranted.
If you are in litigation or expect to be, put a litigation hold in place as soon as the duty to preserve arises. Letting a routine deletion policy erase potentially relevant emails, messages, or files creates exactly the risk Rule 37(e) was written to address.