# Detect tampered and deepfake Lease Agreement > A lease is accepted as proof of address by banks, employers, and licensing bodies, which gives it a value entirely separate from the tenancy it records. Someone who needs an address in a country they do not live in can get one by producing a lease for a property they have never entered, signed by a landlord who does not exist. The terms do not have to be plausible, only the address does. TamperCheck checks whether the document was produced as one piece. **Canonical URL:** https://tampercheck.ai/documents-support/lease_agreement **API document class:** `lease_agreement` **Last updated:** 2026-10-07 --- ## What a genuine lease agreement contains A lease sets out the terms on which one party occupies another's property. It names the lessor and lessee with identity references, describes the demised premises by full address and often by floor, unit, or extent, and states the term as a commencement date, a duration, and an expiry. The financial clauses give the monthly rent, the security deposit, the escalation applied at renewal, and which party carries each utility or maintenance charge. Execution carries both signatures, witnesses in most jurisdictions, the stamp duty paid on the instrument, and a notarial or registration endorsement where the term requires one. A lease used as proof of address has to survive being read for a purpose it was not written for. The address in the demised premises clause, the address in the notice clause, and the address the bank was given all have to be the same address, written the same way. The term dates bound its usefulness, since a lease offered as current evidence has to fall between its own commencement and expiry. The duty paid has to correspond to the rent and term recited, because duty is calculated from them. ## How lease agreement forgeries are made ### Premises clause substitution The property address is replaced on a genuine executed lease so the tenant appears to live somewhere else, often in another country. The address appears in the premises clause, the notice clause, and sometimes the schedule, and an edit reaching only the first of those leaves the document naming two properties. ### Term extension Commencement or expiry dates are moved so an ended tenancy reads as live on the day it is presented. It is the edit that makes an old document useful again, and it usually lands in a machine-set clause where a substituted numeral falls out of register with its neighbours. ### Landlord identity fabrication A landlord who cannot be reached cannot contradict the document, so the signature and contact details are invented rather than copied. An invented signature has no original to compare against, which moves the question to how it was applied: written on this page, pasted onto it, or drawn in a PDF annotation layer. ### Stamp and endorsement reuse A stamp paper header, franking impression, or notarial endorsement is scanned from one instrument and applied to another. Duty is computed from the rent and term recited in the agreement, so a reused impression rarely matches the values it now sits beside, and a scanned impression lies flat where a real one bites into the sheet. ### Rent figure adjustment The monthly rent is raised or lowered according to what the document has to prove: higher to evidence an income stream to a lender, lower to fit an affordability test. Rent also drives the deposit and the duty recited on the same instrument, so one changed figure contradicts two others. ### Template output for verification Lease templates are abundant and generic, so a complete agreement can be produced in minutes with names, an address, and plausible dates. Nothing is edited, so field cross-checks pass. What gives them away is the absence of execution history: ink marks that never touched a sheet, and a file that was never printed. ## What TamperCheck checks on a lease agreement TamperCheck runs 200+ forensic checks across three layers and returns a risk score from 0 to 100 with plain-English findings tied to specific regions of the document. These three carry the most weight on this document class. ### Stamp authenticity and placement Stamps are assessed for whether the ink was impressed onto the page or printed as part of it, and for whether the impression was placed digitally after the fact. ### Signature forgery analysis Signature regions are assessed for ink consistency and for how the stroke sits on the page, which distinguishes a genuine pen stroke from a pasted image of one. ### Date and validity consistency Issue, expiry, and period dates are checked against one another and against the file's own creation metadata, which catches backdating and validity extension. ### And many more checks The three above are the layers that carry the most weight on a lease agreement. Every upload runs the full suite of 200+ checks regardless of document class, spanning file structure and metadata, pixel-level forensics, font and text rendering, optical and print characteristics, provenance signals, AI-generation signatures, and many more checks. ## Who verifies a lease agreement, and why Banks, employers, and agencies accepting lease documents as proof of address. In each case the document is being used to unlock money, access, or a legal status, which is exactly what makes it worth forging. ## How to verify a lease agreement in 4 steps 1. **Check the fields against each other.** Read rent amount, tenancy dates, and landlord signature together rather than one at a time. Forgers typically change one value and leave the rest of the document describing the original. 2. **Inspect the file metadata.** Open the document properties and look at the producer, creation date, and modification date. A document produced by a consumer PDF editor, or created long after the date printed on its face, is worth a closer look. 3. **Ask for a second document.** Request a corroborating document from the same issuer or an adjacent period. Forgery effort concentrates on one file, so inconsistencies surface as soon as there are two to compare. 4. **Run a forensic check.** Manual review catches obvious edits but not field-level pixel manipulation or synthetic generation. TamperCheck runs 200+ forensic checks on a lease agreement and returns a risk score from 0 to 100 within seconds, at $0.50 per document. ## Frequently asked questions ### How do banks verify a lease agreement as proof of address? Banks verify a lease by matching the address in the agreement against every other address the customer has given, confirming the tenancy falls within its own term dates, and contacting the landlord independently where the risk warrants it. Many also require the lease to be stamped or registered, because duty leaves a record outside the document. Forensic analysis then covers the file and names any clause that was edited. ### Can a lease agreement be forged? Yes, easily, and often without any editing at all. A lease is a private agreement between two parties with no issuing authority behind it, so a complete and internally consistent one can be produced from a template with an invented landlord. That is why the useful checks are execution and production evidence rather than content: how the signatures were applied, and whether the file was ever printed or scanned. ### What makes a lease a weak proof of address? Its weakness is that no third party issues it. A utility bill comes from a supplier with an account behind it and a bill number that can be quoted back, while a lease is written by the two people who benefit from it. Requiring stamping or registration adds an external record, and a forensic check on the PDF shows whether the document was assembled in one pass or edited afterwards. ### How do I check a landlord's signature on a lease? Compare it against another document the landlord has signed where you can obtain one, then look at how the mark meets the page rather than at its shape. A signature written on paper varies in pressure and lets the paper texture show through the ink, while a pasted or annotation-layer mark sits above the page with its own edge profile. TamperCheck reports on the signature region specifically. ## Related document types - Property Deed: https://tampercheck.ai/documents-support/property_deed - Title Deed: https://tampercheck.ai/documents-support/title_deed - Mortgage Document: https://tampercheck.ai/documents-support/mortgage_document - Rental Agreement: https://tampercheck.ai/documents-support/rental_agreement - Utility Bill: https://tampercheck.ai/documents-support/utility_bill --- Try TamperCheck now: https://tampercheck.ai/dashboard · Docs: https://tampercheck.ai/docs · Pricing: https://tampercheck.ai/pricing