Residential Lease Execution Formalities in Idaho

At a glance

Requirements one by one

Writing threshold

Idaho Code § 9-505 supplies two tests. Subsection (4) covers a lease longer than one year. Idaho Code § 9-505(1) separately covers an agreement that, by its own terms, cannot be performed within one year after it is made. In either case, the agreement is invalid unless the agreement or a note or memorandum is in writing and subscribed by the party charged or that party's agent.

The tests can produce different results. An exactly one-year occupancy term is not longer than one year, but a delayed start can make the agreement impossible to finish within one year after the parties make it.

Required signatures and authority

Section 9-505 requires subscription by the party charged or that party's agent. If an agent makes the covered longer lease, subsection (4) additionally requires the agent's authority to be written and subscribed by the party charged.

Idaho Code § 55-601 similarly permits a real-property conveyance through a writing subscribed by the disposing party or an agent authorized in writing. It also says the grantee's name and complete mailing address must appear on that instrument. The cited statutes do not impose an across-the-board rule that both parties must sign every written short-term dwelling lease.

Witness, acknowledgment, and notary

The validity provisions require no subscribing witness or notarization between the original parties. Acknowledgment or proof becomes relevant when the instrument is recorded. Idaho Code § 55-805(1) requires the executing person to acknowledge the instrument, or its execution to be proved, before recordation.

A summary uses a more specific form. Under § 55-818, every party to the original instrument must sign and acknowledge the summary that will be recorded.

Electronic execution

Idaho's UETA applies to electronic records and signatures relating to transactions and does not exclude ordinary leases under § 28-50-103. Idaho Code § 28-50-105(b) requires each party to agree to transact electronically; context, circumstances, and conduct may show agreement. Section 28-50-107 then lets an electronic record and signature satisfy writing and signature requirements.

The record must remain usable. Under § 28-50-108(a), a delivered electronic record must be capable of retention when received. If the sender blocks the recipient's ability to print or store it, subsection (c) makes the record unenforceable against that recipient.

Required copy or written statement

The surveyed Idaho provisions state no general landlord duty to deliver a signed or fully executed lease copy and no lease-specific owner-and-manager written statement. That does not alter an agreement's own copy-delivery term or any special rule outside this survey's ordinary private-dwelling scope.

Renewal, modification, and term form

Idaho states no separate execution form for every lease change. A renewal or extension must be tested against both parts of § 9-505: whether the resulting lease exceeds one year and whether the later agreement can be performed within one year from its making.

When a later document conveys an estate in real property, § 55-601 supplies the subscribed-writing rule and requires written authorization for an agent signing for the disposing party.

Recording and third-party effect

Idaho Code § 55-801 permits recording of any instrument affecting title to or possession of real property. Section 55-812 exempts a lease not exceeding one year from its priority rule. A longer unrecorded lease is void against a later good-faith purchaser or mortgagee for value whose conveyance is recorded first. Section 55-815 keeps an unrecorded instrument valid between its parties and against people who have notice of it.

The full lease need not always enter the public record. Section 55-818 permits a signed and acknowledged summary stating the parties, grantee's mailing address, instrument title and date, created interest, and legal description. Only the summary's contents receive the same force and effect as recording the original; the recording also gives constructive notice that the original instrument exists.

Effect of noncompliance

Section 9-505 calls the covered unwritten agreement “invalid” and says evidence of the agreement cannot be received without the writing or secondary evidence of its contents. That consequence is different from nonrecording.

Under §§ 55-812 and 55-815, an unrecorded longer lease remains valid between its parties and as to people with notice but can lose priority to a later good-faith purchaser or mortgagee for value who records first.

What trips people up

Idaho has two one-year tests. A lease can avoid the longer-than-one-year test yet fall within the separate rule for an agreement not performable within one year from making. A delayed commencement date is the common reason.

Agent authority has its own writing requirement. A signature from an agent does not finish the analysis for the longer lease. Section 9-505(4) requires the authority itself to be written and subscribed by the party charged.

A summary gives notice only to its stated contents. Section 55-818 gives the summary the original instrument's recording effect only “as to the contents of the summary,” while separately giving notice that the underlying instrument exists.

Common questions

Does one electronic transaction commit a party to future e-signing?

No. Section 28-50-105(c) says a party who agrees to one electronic transaction may refuse to conduct other transactions electronically, and that right cannot be waived by agreement.

Is an unrecorded lease effective against someone who already knows of it?

Section 55-815 says an unrecorded instrument is valid between its parties and those who have notice. Section 55-812's competing priority rule specifically protects a later good-faith purchaser or mortgagee whose conveyance records first.

Must a recordable summary repeat every lease term?

No. Section 55-818 lists the required summary contents and permits other transaction elements to be included. Terms omitted from the summary do not receive its same-as-original recording effect.

Statutes and sources

• Idaho Code § 9-505 — one-year tests, subscribed writing, written agent authority, invalidity, and evidence consequence. Official text (accessed July 30, 2026).
• Idaho Code § 55-601 — subscribed conveyance and written agent authority. Official text (accessed July 30, 2026).
• Idaho Code §§ 28-50-103, -105, -107, and -108 — UETA scope, party agreement, electronic writing and signature, and retention. Official text: § 28-50-103, § 28-50-105, § 28-50-107, and § 28-50-108 (accessed July 30, 2026).
• Idaho Code §§ 55-801, -805, -812, -813, -815, and -818 — recordable instruments, acknowledgment or proof, later-purchaser and mortgagee priority, conveyance definition, original-party validity, and recordable summary. Official text: § 55-801, § 55-805, § 55-812, § 55-813, § 55-815, and § 55-818 (accessed July 30, 2026).