You can call your MCA lender and tell them you think you've overpaid. They'll say they'll look into it. Then nothing happens.
A phone call doesn't create a record. It doesn't obligate them to respond. It doesn't establish a timeline. A dispute letter does all three, but only if it's built on actual numbers instead of frustration.
What goes in the letter
Start with the basics: your business name, the date of the original MCA agreement, the lender's name as it appears on the contract. Reference the agreement number if you have one.
Then lay out the math. State the advance amount, the factor rate, and the total payback obligation. These should match the contract exactly.
Next, state your payment total. "Per our bank records from [institution name], we have made [X] payments totaling $[Y] between [start date] and [end date]." Be specific. Use the actual numbers from your reconciliation.
If there's a discrepancy, state it plainly. "The total payments exceed the agreed payback amount by $[Z]. We are requesting written confirmation of the account balance and immediate refund of the overpayment."
Why specificity matters
A letter that says "I think I've been overcharged" is easy to ignore. A letter that says "I've made 147 payments totaling $73,412 against a $70,000 obligation, representing an overpayment of $3,412" is much harder to brush off.
The lender has to either agree with your numbers or show you where they're wrong. Either way, you've forced a conversation that's happening on paper, with a timestamp, and with specific figures that both sides can reference.
Send it right
Certified mail with return receipt. This is not optional. You need proof that the letter was delivered and a record of when it arrived. Email is fine as a courtesy copy, but the certified letter is your legal paper trail.
Give them a deadline to respond — 10 business days is standard. State that failure to respond will be treated as confirmation that your records are accurate. That language has legal weight in most states.
What happens next
One of two things. They respond with their own accounting, and you compare numbers. If there's still a gap, you now have both sides documented and can escalate to your state attorney general, the UCC filing office, or an attorney.
Or they don't respond. Their silence, combined with your documented demand, puts you in a strong position for any formal dispute process. You asked. You were specific. You gave them a reasonable deadline. They chose not to engage.
The dispute letter isn't the end of the process. It's the move that turns a vague complaint into a documented claim.