Also known as:reasonable reliance standards · reasonably rely · reasonable reliance
Written by attorneys · grounded in primary & secondary sources — see below
A doctrinal test that evaluates whether a party's actions or beliefs formed in response to another's conduct or representation are objectively justifiable.
Sources & Authorities
How it applies
Common Examples
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Expert Bases Opinion on Field Data
Ryan Roberts, a forensic accountant, reviewed bank statements and third-party ledgers supplied by counsel to calculate lost profits. Experts in his field commonly rely on such records even when some entries are hearsay. The court admitted his opinion because the data met the reasonable reliance standard under the evidence rules.
Servient Owner Acts on Easement Conduct
Rachel Ramirez paved a driveway across her land after observing the easement holder consistently using an alternate route for years. The court held the easement extinguished because her paving constituted action taken in reasonable reliance on the holder's conduct.
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Cases
Federal Rules
Uniform Acts
Model Codes
Restatements
Casebooks
Ravi Reddy paid for and constructed a barn on land after the seller orally promised conveyance and continued to assure performance. Because Reddy substantially changed position in reasonable reliance on the contract and the seller's ongoing assent, the court ordered specific enforcement despite the missing writing.
Neighbor Invests After Permission
Robert Rivera installed underground utilities across Regina Robinson's vacant lot after she verbally permitted permanent access for his new home. The court recognized a servitude by estoppel because Rivera substantially changed position in reasonable reliance on the permission that Robinson could foresee would not be revoked.
Officers Execute Defective Warrant
Riley Rivera and fellow officers searched a residence under a warrant containing a clerical error in the address block. Because the officers' reliance on the warrant's facial validity was objectively reasonable, the court applied the good-faith exception and denied suppression.
Recipient Acts on False Safety Data
Raven Logistics received an engineer's report stating a bridge was structurally sound. Relying on the report, the company routed heavy trucks across the bridge, causing a collapse and injuries. The engineer faced liability because the company took action in reasonable reliance on the negligent information.
Common questions
Frequently Asked
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What must a party show to establish an easement by estoppel under the reasonable reliance standard?+
The owner or occupier must have permitted use or represented a servitude under circumstances making substantial change of position reasonably foreseeable. The user must then have substantially changed position in reasonable reliance on that belief or representation.
Supporting sources
How does the reasonable reliance standard affect admissibility of expert testimony?+
An expert may base an opinion on facts or data that experts in the field would reasonably rely on even if those facts are inadmissible, provided the probative value substantially outweighs prejudice when disclosed to the jury.
Supporting sources
When does reasonable reliance permit specific enforcement of an oral land contract?+
A party seeking enforcement must show reasonable reliance on the contract and the other party's continuing assent, plus a change of position so substantial that injustice can be avoided only by specific enforcement.
Supporting sources
Does the reasonable reliance standard apply to negligent misrepresentation claims?+
Yes. One who negligently supplies false information is liable for physical harm caused by action taken by another in reasonable reliance on that information when the actor should expect such reliance.
Supporting sources
468 U.S. 897 (1984)Criminal Procedure
…rule should be modified so as not to bar the use in the prosecution’s case-in-chief of evidence obtained by officers acting in reasonable reliance on a search warrant issued by a detached and neutral magistrate but ultimately found to be unsupported by probable cause. (a) The exclusionary rule is a judicially created remedy designed…