The lease agreement looked completely normal when it was signed.
But the real problems often begin afterward.
Some people only discover the issue after moving out, disputing a security deposit, or dealing with a legal conflict:
Why does the lease suddenly have an extra page?
Why are there clauses that were never there before?
Why are the amounts, dates, or notes different from the original agreement?
This kind of situation — sometimes referred to as a “ghost lease agreement” — is not uncommon in real-world rental disputes.
Because of this, both landlords and tenants should pay attention not only to the lease contents themselves, but also to how to prevent the agreement from being swapped, altered, or secretly modified afterward.
Changing only a few words or numbers may not seem serious at first.
However, these actions can potentially lead to criminal liability.
Let’s first look at what the law says.
What Does the Law Say?
Criminal Code Article 210:
“A person who forges or alters a private document, thereby causing damage to the public or another person, shall be sentenced to imprisonment for not more than five years.”
✨ Plain Explanation: If someone modifies a lease agreement without permission — such as adding clauses, replacing pages, or reprinting a changed version — and the changes could affect another person’s rights or interests, it may constitute the crime of altering a private document.
This is not merely a civil dispute. It may also involve criminal liability.
⚖️ Legal Source: Criminal Code Article 210 – Law.moj.gov.tw
Criminal Code Article 216:
“A person who uses a document referred to in Articles 210 through 215 shall be punished in accordance with the provisions governing forgery, alteration of documents, false entries, or causing false entries.”
✨ Plain Explanation: Liability may not apply only to the person who changed the document.
If someone knowingly uses a tampered lease agreement, relies on it to assert rights, or submits it to a court or another person, that individual may also face legal responsibility.
⚖️ Legal Source: Criminal Code Article 216 – Law.moj.gov.tw
What Is “Altering a Document”?
Many people assume that only creating a completely fake lease agreement is illegal.
In reality, “altering a document” is much more common.
Altering a document generally means that an originally genuine document is modified without authorization.
Common examples include:
- Secretly adding lease clauses
- Changing rent or security deposit amounts
- Swapping out certain pages
- Modifying a photocopy and reprinting it
- Adding handwritten notes without consent
- Changing dates, lease terms, or penalty clauses
📌 The key point is simple:
Any modification made without both parties’ agreement can potentially become a legal problem.
Why Are Lease Agreements Easily Swapped or Altered?
Many lease agreements are signed only on the final page.
The middle pages may have no markings at all, and the pages themselves are not connected in any way.
In these situations, if someone later removes or replaces a page, the other party may not notice immediately.
This becomes even more likely when the lease agreement contains many pages or attachments.
Some people may take advantage of situations where:
- Neither party keeps a complete copy
- Pages are not numbered
- Changes are not initialed or stamped
- Different electronic versions are mixed together
Eventually, each side may end up presenting a different version of the lease agreement.
How Can Lease Agreements Be Protected From Tampering?
Most risks can actually be prevented at the time of signing.
Each Party Should Keep an Original Copy
The most basic step is for both parties to keep a complete copy of the lease agreement.
Do not rely only on photos or a PDF file.
Each side should physically retain a full version of the signed agreement.
If a dispute arises later, both copies can be compared.
Use Cross-Page Seals or Signatures
This is one of the most practical and important methods.
A cross-page seal is a seal placed across the boundary between two pages.
If someone later swaps or removes a page, the seal alignment will no longer match.
It is also important that the seal actually belongs to the party using it.
🚫 Generic rubber stamps that simply say “cross-page seal” have little practical value because anyone can buy them.
If no seal is available during signing, signatures or fingerprints may also be used.
Confirm All Modifications Together
If the lease agreement contains handwritten changes, additions, or corrections, both parties should sign, stamp, or fingerprint next to the modification.
This makes it much easier to determine later whether the change was truly agreed upon.
Include Page Numbers and Total Page Counts
Formal agreements often contain wording such as:
“Page 5 of 20” or “5/20”
This is not merely for appearance.
It helps prevent additional pages from being secretly inserted or replaced.
This detail becomes especially important when the lease includes many attachments.
Are Digital Signatures and Third-Party Signing Platforms Safer?
Electronic lease agreements have become increasingly common.
Examples include:
These third-party signing platforms usually preserve:
- Signing timestamps
- Edit histories
- IP records
- Verification procedures
- Digital certificates
Compared with simply sending PDFs or screenshots through messaging apps, these systems generally provide better security.
Taiwanese judicial practice also increasingly recognizes that electronic records with readability and legal effect may constitute “documents” under the law.
Examples may include:
- Emails
- PDF contracts
- Cloud-based documents
- Digital signatures
- Electronic certificates
If someone unlawfully alters electronic records, it may still involve document forgery or document alteration issues.
Why Can’t Lease Agreements Be Changed Freely?
Many people think a lease agreement is just “a piece of paper.”
But legally, it is much more important than that.
A lease agreement is formally known as a lease contract and is a type of civil contract.
Once both parties express mutual agreement, the contract may become legally binding.
If a dispute later reaches court, the lease agreement itself may become one of the most important pieces of evidence for determining rights and obligations.
Because of this, additions, modifications, or supplemental terms generally require both parties’ consent.
One party cannot simply change the agreement alone.
For real estate leases in Taiwan, agreements with lease terms longer than one year are generally also required to be made in writing.
This is why every page and every clause within the lease agreement matters.
Common Situations: Many Disputes Start With Small Details
In many cases, the entire lease agreement is not forged.
Instead, the problem is simply:
“There was suddenly one extra sentence.”
For example:
- An unexpected clause prohibiting early termination
- An additional cleaning fee
- A newly added penalty clause
- A swapped equipment attachment list
Without page numbering, cross-page seals, or signatures confirming changes, proving which version is genuine can become extremely difficult later.
🧠 Related Read: Is a Rental Agreement Always Necessary in Taiwan?
💀 Related Read: What Are Mandatory and Prohibited Clauses in Taiwan?
💰 Related Read: Are Digital and Electronic Signatures Legally Valid in Taiwan?
🧘 Related Read: Can a Landlord Require a Tenant to Return the Lease in Taiwan?
Conclusion
The scariest part of a lease agreement is often not the signing itself.
It is discovering afterward that each side is holding a completely different version.
Because of this, preventing problems at the time of signing is usually far more important than arguing later about who is right.
Cross-page seals, page numbering, signatures beside modifications, and complete copies for both parties may seem like small details, but they are often the most effective protection for everyone involved.
Whether using paper agreements or electronic lease agreements, Taiwanese law already provides corresponding legal protections and rules.
A little extra care during signing can often prevent major disputes later on.
