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AI Contract Analyzer: 7 Red Flags to Check Before You Sign

Published · Updated · 7 min read

Most contract problems don't show up the day you sign. They show up months later, when someone points to a clause nobody read carefully. You don't need to be a lawyer to spot the most common warning signs. You need to know where to look and what to ask.

This guide gives you the seven red flags that repeat in any contract and explains what an AI contract analyzer can do for you: a tool that reads the text, compares it with what is usually risky and with the law of your country, and tells you what to look at before you sign. It helps you arrive better informed. It is not a lawyer on a screen.

It works for a lease, a services agreement, a sale, or a deal with a supplier. The exact rules change from country to country, but the red flags repeat.

1. Blanks and missing details

A contract with gaps like "[NUMBER OF DAYS]", "____" or "to be agreed" is not finished. An empty space is a decision someone will make later, and not always in your favor.

  • Fill in every detail before signing: dates, amounts, deadlines, addresses, and ID numbers.
  • If something is "defined later", ask for it to be written down how and by whom it will be defined.

2. Amounts: figures and words must match

Check every sum of money twice. When a contract writes the value in both numbers and words, they must say exactly the same thing. A mismatch like "$12,000,000 (twelve million five hundred thousand)" is more common than it looks, and it causes disputes because each side reads the figure that suits them.

Also add up installment payments yourself: the installments must total the contract value.

3. Penalties and fines

Look for words like "penalty", "liquidated damages", "fine", or "indemnity". Ask yourself:

  • Does it apply equally to both parties, or only to you?
  • Is it proportional to the possible harm, or does it look like a number meant to scare you?
  • Can it stack with other charges for the same breach?

A very high penalty, or one that only applies to you, is one of the clearest signs of an unbalanced contract.

4. Automatic renewal and how to end it

Many contracts renew on their own if you don't give notice in advance. Find:

  1. The term and the date it ends.
  2. The notice period to avoid renewal and the exact way to give it (in writing, to which address, with what proof).
  3. The cost of ending early.

If the notice period is long and leaving is expensive, you're stuck even when the service no longer works for you.

5. Unilateral changes

Be wary of phrases like "the company may modify these terms at any time". A contract is an agreement between two sides: if only one can change prices, deadlines, or obligations without your consent, the deal is no longer balanced. Ask that any change require your written acceptance.

6. Governing law and where disputes are resolved

Check which law governs the contract and which city or court will resolve disputes. If it says any conflict will be settled in another country or a distant city, fighting a breach can cost you more than you're claiming.

7. Annexes and anything "incorporated by reference"

Sometimes the important terms aren't in the body of the contract but in an annex, a set of "terms and conditions", or a document it only refers to. Ask for those documents and read them: they are part of what you sign.

What an AI contract analyzer can check for you

A good contract analyzer runs through these same red flags in minutes and hands them back ordered by seriousness:

  • Clauses that hurt you: disproportionate penalties, automatic renewal, unilateral changes, and very costly exits. A good analysis doesn't just flag them: it explains why each one is a problem and how serious it is.
  • What is missing: blank spaces, annexes that are mentioned but not included, empty signature blocks.
  • Amounts and dates: figures in words that don't match the figures in numbers, installments that don't add up to the total, dates that have already passed or have no year.
  • The law that applies: what is normal in one country can be illegal or abusive in another, so a useful analysis starts from the country where the contract is signed.
  • What to do next: it doesn't stop at the diagnosis; it suggests how to change the wording and which points are worth holding firm on.

What an AI contract analyzer can't do

It's worth saying clearly, because this is where trust is most often lost:

  • It is not legal advice. It doesn't replace a lawyer when a lot of money or risk is involved: a property purchase, the sale of a company, a lawsuit.
  • It can be wrong. Treat it as a list of questions, not a verdict. If it cites a law, check the article in the official source before relying on it.
  • It only sees the text you give it. It doesn't know about verbal agreements, annexes you didn't upload, or the context of your relationship with the other side.
  • It doesn't negotiate for you. It tells you where to ask for changes; getting them is up to you and the other party.
  • Photos and scans can be misread. If you upload a photo or a scanned PDF, check that the recognized text matches the document.

How to use a contract analyzer in five steps

  1. Upload the whole contract, with its annexes. A half-read contract gives a half-done analysis.
  2. Tell it the country and which party you are. The same clause can protect or hurt you depending on whether you are the one paying or the one being paid, the tenant or the landlord.
  3. Start with the most serious items. Read what is marked high risk first and leave the minor details for last.
  4. Verify the legal citations. Open the official source of each law it mentions and check that it says what is claimed.
  5. Take what you found into the conversation. Ask the other side for the changes in writing, or bring the specific points to your lawyer: reviewing a document costs less when the doubts are already marked.

How to choose an analyzer: five questions

  • Does it explain why each alert matters, or does it just give a score?
  • Does it cite the law it relies on and make clear what it could and couldn't verify?
  • Does it offer alternative wording, or only point out the problem?
  • Does it state its limits honestly, or promise "zero risk"?
  • What does it do with your document? A contract can contain personal or confidential data: read the privacy policy before uploading it.

The Catch: a contract analyzer for individuals and companies

The Catch is an AI contract analyzer built for people who aren't lawyers. You upload the document as a PDF, Word file, photo or TXT (scanned PDFs included), choose the country among Colombia, Mexico, Chile, Spain, Argentina, Brazil, Peru, Ecuador, the United States and Canada, or the international option, and you get:

  • the clauses flagged by risk level, with an explanation of each one;
  • backing from official sources, showing what was verified and what you should confirm;
  • an action plan with the money at stake, the dates you must not forget, and the points not worth giving up;
  • a suggested rewrite for each problematic clause.

Your first analysis is free: paste a contract you have yet to sign and compare the result with what you had already noticed.

If you are about to sign a residential lease in Colombia, also check which clauses go against Law 820 of 2003.

Before you sign: three habits that help

  • Ask for changes in writing. What's said gets forgotten or disputed; what's written stays.
  • Keep a signed copy of everything, including the annexes.
  • If a lot of money or risk is at stake, consult a lawyer. A tool can help you see the warning signs, but it doesn't replace professional advice for your case. Walking into that conversation knowing what to ask already saves time and money.

This article is general information and is not legal advice. For your specific case, consult a lawyer.