What Should a CAM Demand Letter Include? (10 Required Elements)

A CAM demand letter written without a checklist tends to be either too aggressive (threatening legal action before establishing the numbers) or too vague (stating a general belief in overcharging without a specific dollar claim). Both versions fail. The landlord needs enough information to verify your claim or dispute it specifically — and you need a letter that creates a paper trail if the dispute escalates.

Here are the 10 elements that matter.

Table of Contents

1. Proper Notice Identification
2. Lease Reference and Dispute Provision Citation
3. The Overcharge Summary Table
4. Line-Item Calculations
5. Exhibits and Supporting Documentation
6. Documentation Request (Audit Rights Invocation)
7. The Period Under Dispute
8. The Specific Resolution Ask
9. Response Deadline
10. Proper Notice Delivery
11. Frequently Asked Questions

1. Proper Notice Identification

The opening lines of the letter establish jurisdiction over the dispute. Include:

• Full legal name of your business entity
• Property address and suite/unit number
• Lease date and any controlling amendments
• The reconciliation statement date (or period) being disputed

This seems like boilerplate, but missing or inaccurate identifying information can create procedural questions later. If the lease was assigned and the named tenant is a predecessor entity, use the current tenant name and note the assignment.

2. Lease Reference and Dispute Provision Citation

State explicitly that this letter constitutes formal notice of dispute under a specific lease section. Something like:

"Pursuant to Section 8.3(c) of the Lease Agreement dated March 1, 2019, Tenant hereby provides formal written notice of dispute of the 2024 Annual CAM Reconciliation Statement received on January 15, 2025."

This sentence does several things. It starts your dispute window clock (or demonstrates it is already running). It establishes the correct contractual mechanism. And it signals to the landlord's property management team that this letter needs to go to their legal or accounting department, not into the general correspondence file.

The ABA Real Property section has documented that tenant demands which cite specific lease provisions recover at substantially higher rates than those that do not. The mechanism is simple: a landlord who receives a demand citing Section 8.3(c) has to look up Section 8.3(c) to respond. A landlord who receives a general complaint letter can respond with a general denial.

3. The Overcharge Summary Table

Before the detailed calculations, include a summary table. This lets the reader see the total claim at a glance:

A table like this accomplishes two things. It shows that your claim is specific and calculated, not estimated. And it gives the landlord's accounting team a clear target for their response — they have to either agree with each line, dispute the lease interpretation, or produce documentation showing different numbers.

4. Line-Item Calculations

For each disputed item in the summary table, include a separate calculation section that shows your work. The minimum for each item:

The lease provision that controls this charge. Quote the relevant sentence, not just the section number. If the management fee cap is "not to exceed four percent (4%) of total operating expenses," quote that language.

What the reconciliation statement shows. The actual line-item amount from the statement you received.

What the correct calculation produces. Using your lease's definitions, show what the charge should have been.

The difference. State the overcharge in dollars.

This is the part of the letter most tenants skip, and it is also the part that decides whether the landlord takes the dispute seriously. A calculation section that traces from lease language to billed amount to correct amount creates a record that is difficult to ignore and, if litigation becomes necessary, is exhibit-ready.

5. Exhibits and Supporting Documentation

Attach whatever you have that supports your calculations:

• Your copy of the reconciliation statement (mark the disputed line items)
• Relevant excerpts from the lease and amendments (the specific sections you are citing)
• Any prior year reconciliation statements that show the same error pattern
• Your payment records for the disputed period

Do not attach everything you have. Attach what is necessary to support the specific claims in your letter. Burying the relevant information in 200 pages of attachments makes your letter harder to process, not more convincing.

6. Documentation Request (Audit Rights Invocation)

Most commercial leases include an audit rights clause that entitles the tenant to inspect the landlord's records supporting the CAM reconciliation. This clause typically requires the tenant to make a written request within a specified period.

Your demand letter should invoke this right explicitly. Cite the section number and request specific records:

• Detailed general ledger showing all operating expenses for the disputed period
• Vendor invoices for amounts above a specified threshold (often $5,000 or $10,000)
• Insurance certificates and premium calculations
• Management fee calculation worksheet showing the base amount and the rate applied
• Pro-rata share calculation showing total rentable area, occupied area, and any exclusions or gross-up adjustments

Some leases specify that the dispute window does not begin until the landlord provides records that are "reasonably detailed." If yours includes that language, note it. It may give you additional time.

7. The Period Under Dispute

State exactly which reconciliation period your letter covers. If you are disputing multiple years, list them. Note the date you received each reconciliation statement (the dispute clock often starts from receipt, not from the date of the statement).

If you are uncertain whether your dispute window is still open, state the dates and note the applicable lease provision. Do not silently assume you are within the window. If there is any ambiguity, address it in the letter.

8. The Specific Resolution Ask

This element is missing from most CAM dispute letters. Tenants frequently state the overcharge amount but fail to state specifically what they want the landlord to do about it.

Be explicit:

"Tenant requests that Landlord issue a credit of $24,000 against Tenant's next quarterly CAM estimate payment, together with written confirmation of the corrected calculation methodology for future reconciliation periods."

Or:

"Tenant requests that Landlord remit $24,000 by check within 45 days, together with a corrected reconciliation statement for the 2024 period."

A specific resolution ask gives the landlord something to say yes to. It also frames any counteroffer against your specific request, which helps keep the negotiation grounded in your numbers rather than the landlord's.

9. Response Deadline

Give a specific date — typically 30 days from the letter's delivery date — and state plainly what happens if you do not receive a response. The options depend on your lease:

• Formal audit request under the audit rights provision
• Mediation or arbitration if the lease requires ADR before litigation
• Filing in the appropriate court or arbitration forum

Keep the tone factual. You are describing a process, not making threats. A statement like "If Tenant does not receive a substantive response by [date], Tenant will proceed with a formal audit pursuant to Section 8.3(d) of the Lease" is appropriate. "If we don't hear from you, we'll sue" is not.

10. Proper Notice Delivery

The letter must be sent by whatever method the lease requires. Read the "Notices" clause and follow it precisely. Common requirements:

• Certified mail with return receipt to a named individual at a specific address
• Overnight courier (FedEx, UPS) with tracking
• Hand delivery with written acknowledgment

Keep all delivery receipts. If the lease permits multiple methods, use the most reliable one — typically overnight courier with tracking. The date of delivery is often what starts or stops the clock on landlord response obligations.

Frequently Asked Questions

Q: Can I email my CAM dispute letter? A: Only if the lease expressly permits email for formal notice. Most commercial leases require physical delivery to a specified address. Even if you routinely communicate with your property manager by email, the formal dispute notice likely needs to go by certified mail or courier to the address in the Notices clause. Sending only by email may not satisfy the contractual requirement and could jeopardize your claim.

Q: How long should the letter be? A: Long enough to include all 10 elements, short enough that a busy property manager will read it the same day. Three to five pages of letter text plus exhibits is typical. A 20-page letter that buries the key calculations in dense narrative is less effective than a clean four-page letter with a summary table and clear calculations.

Q: Should I send the letter myself or hire an attorney? A: For straightforward overcharges with clear lease language and documented calculations, a well-written tenant letter is often effective. For disputes above $25,000, situations involving ambiguous lease language, or landlords who have already rejected a documented claim, attorney involvement adds value. See When to Hire a Lawyer for a CAM Dispute for a detailed threshold analysis.

Q: What if I discover more overcharges after sending the letter? A: Send a supplemental notice that references your original letter and adds the new claims. Do not wait to combine everything into one final letter if your dispute window is running. A timely initial letter that preserves your rights, followed by a supplemental letter with additional claims, is better than a perfect letter sent after the deadline.

Q: How do I know if my numbers are right before sending? A: You need the actual reconciliation statement, your lease, and a clear calculation methodology. The most common errors involve management fee caps (percentage of total operating expenses), pro-rata share denominators (total versus occupied rentable area), and capital expenditure reclassification (items that should be excluded but were included). A free CAM audit will flag these automatically.

Sources: Fielding & Beaton, "An Introduction to Operating Expenses in Commercial Leases," ABA Probate & Property (Dec. 2023); Schorr, "Fraudulent Common Area Overcharges in Commercial Leases," ABA Business Torts Journal (Fall 2008); Tolou Realty Assocs. v. Dolphin Diner Corp., N.Y. App. Term (2025); 735 ILCS 5/9-209

Need a documented overcharge calculation to attach to your letter? Run a free CAM audit at CamAudit. For the full dispute process from start to finish, read the CAM Dispute Guide.