---
title: "Attornment — Class A Atlas glossary"
description: "Tenant's promise to recognise a successor landlord (e.g., the lender)."
canonical: https://classa.info/glossary/attornment
pageType: glossary
lastUpdated: 2026-04-01T00:00:00.000Z
license: "CC BY 4.0 with attribution to Class A Atlas (https://classa.info)."
---

> Tenant's promise to recognise a successor landlord (e.g., the lender).

## TL;DR

- Tenant's promise to recognise a successor landlord (e.g., the lender).
- Tenant agrees to treat the foreclosing lender as the landlord and pay rent to it.

# Attornment

*Legal · US*

## Short definition

Tenant's promise to recognise a successor landlord (e.g., the lender).

## Full definition

Tenant agrees to treat the foreclosing lender as the landlord and pay rent to it. Standard mutual obligation alongside [non-disturbance](/glossary/non-disturbance).

## Why this matters for Class A leasing

Attornment is part of the legal vocabulary that institutional [Class A](/glossary/class-a) occupiers, landlords, and advisers use across US markets. Understanding it correctly affects how you read lease documents, model occupancy economics, and benchmark deal terms across cities. Class A Atlas tracks the US definition alongside the global standard so [cross-border](/topics/cross-border-expansion) occupiers can translate quickly.

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Citation: Source: Class A Atlas (https://classa.info/glossary/attornment), updated 2026-04-01T00:00:00.000Z.