NNN Tenant Due Diligence: What Landlords Must Check Before Signing

NNN Tenant Due Diligence Checklist for Landlords | PigJet visual summary

If you've owned NNN retail properties for any length of time, you've probably seen what happens when due diligence gets rushed. A tenant looks great on paper — recognizable brand, solid concept, eager to sign — and six months later they're dark and you're fighting over a personal guarantee that turned out to be worth nothing.

Tenant vetting in NNN deals is different from residential. You're not just checking a credit score. You're underwriting the operating health of a business, the strength of a brand, and the enforceability of a lease guarantee — all before you hand over a $1M+ property on a 10-year term.

This is the checklist I run through before I sign anything.

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Start With the Business Entity, Not the Brand

The first mistake landlords make is signing a lease with the brand name as the tenant. McDonald's, Starbucks, whatever — what matters is who exactly is signing.

There are two basic categories:

Corporate-guaranteed leases: The parent company (the actual publicly traded entity or a large operating company) is the tenant of record or provides a corporate guarantee. This is the gold standard.

Franchisee leases: A local franchisee LLC signs the lease, sometimes backed by a personal guarantee from the franchisee, sometimes with limited or no corporate backing from the franchisor. This is much more risk.

Never assume brand strength equals lease strength. I've seen national fast food franchisees with the brand's logo on every door operating out of entities with negative net worth. Get the actual legal entity name that's signing and find out who's behind it.

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Financials: What to Ask For and What to Read

For franchisee and independent operators, request:

What you're looking for:

For publicly traded companies or their subsidiaries, pull their 10-K and 10-Q. Look at the specific operating segment, not just the consolidated financials.

If they won't provide financials, that's a hard stop. A serious tenant with a healthy business has no reason to refuse.

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Credit and Guarantor Analysis

Personal guarantees: Get a personal financial statement from any individual guarantors. Look at net worth (liquid vs. illiquid assets), existing liabilities, and whether the guarantee is limited (capped dollar amount or time-limited) or full and unconditional.

A limited guarantee — say, capped at 12 months' rent — is significantly less protection than a full guarantee. Know what you're getting.

Business credit check: Run a D&B (Dun & Bradstreet) or Experian Business report on the entity. Look for:

Bank references: Ask for a bank reference letter. This doesn't tell you much, but a tenant who can't produce one is a yellow flag.

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Brand Health and Unit-Level Performance

For franchisors and multi-unit operators, brand health matters as much as the individual tenant's financials. A franchisee operating a brand in terminal decline can fail even if their own numbers look okay today.

What to check:

I've turned down tenants with strong individual financials because the brand had already started its decline. It's a longer-term call, but NNN leases are long-term.

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Site History: Know What You're Leasing Into

Pull the site history — prior tenants, prior uses, any dark periods. A location that's been through three tenants in eight years is telling you something about the trade area.

For any prior retail use:

Also check permitting history and any environmental or ADA compliance issues. Your attorney handles the legal review, but knowing the site history helps you ask the right questions.

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Lease Guarantee Structures: What's Actually Enforceable

The guarantee structure is the last line of defense when a tenant fails. Before signing:

Personal guarantee: Who is it from? Is it joint and several (all guarantors equally liable) or individual? Does the guarantor have real assets to attach?

Corporate guarantee: Is it the operating entity or a parent? Check the parent company's financials if you can.

Lease guarantee burn-off provisions: Some leases include clauses where the guarantee "burns off" after the tenant meets certain conditions (e.g., 24 consecutive months of timely rent, no defaults). Know when and if your guarantee expires.

Guarantee waivers: Watch for provisions in the lease that require you to pursue the tenant before the guarantor, or that waive defenses. Have your attorney review these.

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What to Do With All of This

Put everything in a folder and build a simple decision memo: entity name, guarantor, net worth, key financials, brand health summary, red flags, and your recommendation. If you have a partner or lender reviewing the deal, they'll want this anyway.

The due diligence process doesn't have to be complicated, but it does have to be systematic. A checklist beats intuition every time in a 10-year deal.

For landlords managing multiple properties, keeping this documentation organized alongside your lease files is critical — especially when you're tracking guarantees that might burn off years into the lease. That's a workflow detail that gets missed when you're running everything through email and spreadsheets. Some operators use purpose-built property management tools to keep it centralized; others maintain it manually. Either way, the file needs to exist.

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The Bottom Line

NNN tenant due diligence is really underwriting in disguise. You're betting that this operator, in this location, with this brand, can make rent for 10+ years. The checklist above won't eliminate risk — nothing does — but it will make sure you're making an informed bet, not a blind one.

If you're in lease negotiations, review your options on early termination clauses before you sign.