The short answer: under 38 C.F.R. § 3.159(c), VA must make reasonable efforts to obtain the records a claimant identifies, keep requesting federal records until it has them or they are shown not to exist, tell the claimant when it cannot get something, and provide an exam or opinion when the low threshold in § 3.159(c)(4) is met. A duty-to-assist error is a failure of one of those obligations that existed when VA decided the claim, and in a higher-level review or Board appeal the usual result is that the claim goes back to VA to correct it.
Finding one is a records exercise. The rules below are the checklist; the claims file is where you look.
When the duty applies
VA's duty to assist applies to substantially complete initial and supplemental claims, and to claims returned for readjudication after a higher-level adjudicator or the Board identifies a duty-to-assist error, until VA issues notice of its decision (§ 3.159(c)). When a claim comes back for a duty-to-assist error, the agency of original jurisdiction must also correct any other duty-to-assist errors the reviewer did not identify.
It does not run during a higher-level review or a Board appeal themselves: those lanes review what VA did before its decision. After a decision, new evidence comes in only through a supplemental claim or a Board docket that accepts it (§ 3.159(b)(4)).
What VA has to do
Records not held by the federal government
For private medical providers, employers, and state or local governments, reasonable efforts generally mean an initial request and, if the records are not received, at least one follow-up request (§ 3.159(c)(1)). No follow-up is needed if the response shows the records do not exist or a follow-up would be futile. If VA learns another source may have the records, it makes the same effort there.
The claimant has to cooperate: identify the custodian, the approximate dates, and the condition treated, and sign a release in a form the custodian accepts, usually VA Form 21-4142.
Records held by the federal government
For service records, VA medical records, records of care VA paid for, and records of other federal agencies such as the Social Security Administration, VA must make as many requests as are necessary (§ 3.159(c)(2)). It may stop only when it concludes the records do not exist or further efforts would be futile, for example when the agency says it does not have them.
In a compensation claim, VA must try to obtain service treatment records, other relevant service records, VA medical records, and relevant records held by any federal agency (§ 3.159(c)(3)).
Telling the claimant when it cannot get records
If VA cannot obtain non-federal records after reasonable efforts, or concludes federal records do not exist or further efforts would be futile, it must give the claimant notice of that fact (§ 3.159(e)). A file with a failed request and no notice is worth flagging.
Exams and medical opinions
In a compensation claim, VA provides an exam or obtains an opinion when it is necessary to decide the claim (§ 3.159(c)(4)). It is necessary when the record lacks enough competent medical evidence to decide the claim, but:
- 1contains competent lay or medical evidence of a current diagnosed disability or persistent or recurrent symptoms,
- 2establishes an in-service event, injury, or disease (or a presumptive disease manifesting in the presumptive period, with the required service), and
- 3indicates that the disability or symptoms may be associated with that event or with another service-connected disability.
The third element is a low bar. The regulation says it can be satisfied by competent evidence of post-service treatment for the condition or another possible association with service. For a supplemental claim, the exam duty applies once new and relevant evidence is presented or secured.
Where duty-to-assist errors hide in the file
- An identified provider never contacted. The claimant named a doctor or hospital, signed a release, and the file shows no request.
- One request, no follow-up for private records, with no response showing they do not exist.
- Federal records abandoned early: one request for VA treatment records or Social Security records, then silence, with no formal finding that they are unavailable.
- Missing service treatment or personnel records relevant to the in-service event, with no search of the alternate sources the facts suggest.
- No notice that records could not be obtained.
- No exam where the three § 3.159(c)(4) elements were in the record.
- An exam that does not answer the question: no rationale, the wrong theory (direct only, on a claim filed as secondary), no aggravation opinion on a secondary claim, or lay evidence left out of the reasoning. Whether an inadequate opinion is argued as a duty-to-assist error or as the weight of the evidence, it is usually the defect that matters most.
Work through the records trail in date order during your C-file review: each request, each response, each follow-up, each notice.
What each lane does with the error
| Lane | What happens |
|---|---|
| Higher-level review (20-0996) | If the reviewer finds a duty-to-assist error that existed when VA decided the claim and cannot grant the maximum benefit, the claim must be returned for correction and readjudication (§ 3.2601(g)). |
| Supplemental claim (20-0995) | You add new and relevant evidence yourself, and the duty to assist applies again to the supplemental claim. |
| Board appeal (10182) | Unless the issue can be granted in full, the Board must remand for a duty-to-assist error that occurred before the decision on appeal (38 C.F.R. § 20.802(a)). |
The choice turns on time and control. A higher-level review returns the error for VA to fix; a supplemental claim lets you supply what was missing, such as the private records or a medical opinion, rather than waiting for VA to develop it. See choosing the review lane.
Frequently asked questions
What is VA's duty to assist?
The obligation in 38 C.F.R. § 3.159(c) to help a claimant obtain evidence: records from private and federal sources, service records in compensation claims, and a medical exam or opinion when one is necessary to decide the claim.
How many times does VA have to request private medical records?
Generally an initial request and, if the records are not received, at least one follow-up, unless the response shows the records do not exist or a follow-up would be futile (§ 3.159(c)(1)).
How many times does VA have to request federal records?
As many times as necessary, until VA concludes the records do not exist or further efforts would be futile (§ 3.159(c)(2)).
What happens when a higher-level review finds a duty-to-assist error?
If the error existed when VA decided the claim and the reviewer cannot grant the maximum benefit, the claim is returned to the agency of original jurisdiction to correct the error and readjudicate (§ 3.2601(g)).
When does VA have to provide a C&P exam?
When the record lacks enough medical evidence to decide the claim but contains evidence of a current disability or recurring symptoms, establishes an in-service event, injury, or disease, and indicates the two may be associated (§ 3.159(c)(4)).
VA forms mentioned in this guide
Written for accredited representatives
This guide is for VA-accredited claims agents, attorneys, and VSO representatives. Commander for Advocates is case management software built around this work: reading the C-file, choosing the lane, and assembling the packet. See how it works →
This guide is educational information about the VA claims system — it is not legal or medical advice, and it does not predict or promise any claim outcome. Regulations and procedures change; always verify current requirements at VA.gov. VA Claim Commander is a self-service documentation tool, not a VSO, law firm, or VA-accredited representative.