Legal Documents to Verify Before Buying Property in India (2026)

By ResiBuy Research Team · Updated 2026-07-20

Before buying any property in India, verify six document sets: the title documents and chain of ownership, the encumbrance certificate, the sanctioned building plan and approvals, the Occupancy or Completion Certificate for ready properties, the land and development documents for under-construction projects, and the sale agreement itself. Each document proves one specific thing and nothing more — the most expensive buyer mistakes come from treating one document as proof of everything. Photocopies shown by a seller prove nothing; every document should be verified against the records of the authority that issued it.

This guide explains what each document actually establishes, where to verify it independently, and the sequencing that keeps you protected.

The principle: documents prove one thing each

A registered sale deed proves a transaction happened — not that the seller had clean title. An Occupancy Certificate proves the building may legally be occupied — not that the flat is unencumbered. A RERA certificate proves registration — not approvals. Legal verification is the practice of assembling proofs until no gap remains, which is why a checklist beats intuition here.

Title documents and the chain of ownership

What it proves: that the seller owns what they are selling, and how they came to own it.

The current title document — the seller's own registered sale deed, gift deed, partition deed or inheritance documents.
The chain — the sequence of registered transfers before that, ideally covering 30 years. Each link should be a registered instrument; unregistered transfers, notarised "agreements," and general-power-of-attorney sales are weak links that a court may not honour.
Mutation records — the revenue/municipal record showing the current owner's name. Mutation is not title by itself, but a mismatch between the deed and the mutation record is a question that must be answered before, not after, purchase.
For land and independent houses: the record of rights (khata, patta, 7/12 extract, jamabandi — the name varies by state) from the revenue authority.

Where to verify: certified copies from the sub-registrar's office where the deeds were registered; several states now offer online access to registered deed indexes. This is the one area where a property advocate's title search and written opinion is strongly recommended for every purchase, and essential for resale and land.

Encumbrance Certificate (EC)

What it proves: what registered transactions — sales, mortgages, releases — exist against the property for the period covered.

Obtain it yourself from the sub-registrar or the state's online portal; do not rely on the seller's copy.
Ask for the longest period available, not the 13-year default many offices issue.
What it cannot show: unregistered claims, pending litigation, and equitable mortgages created by deposit of title deeds in some circumstances. A clean EC is necessary, not sufficient — which is why the EC and the title search travel together.

Sanctioned plan and approvals

What it proves: that the building was legally permitted, and in what form.

Sanctioned building plan from the local development authority or municipal body — compare it against what is actually built. Extra floors, converted parking, and covered balconies beyond the sanction are deviations that can block the OC, invite penalties, or worse.
Layout approval for plotted developments.
For under-construction projects, the commencement certificate and the approvals disclosed in the RERA filing (how to read them).

Occupancy Certificate and Completion Certificate

What they prove: the building was completed per sanction (CC) and is fit for legal occupation (OC). Terminology and sequence vary by state; in most, the OC is the document that matters to a buyer.

A "ready to move" flat without an OC is not legally ready. Consequences of occupying without one range from penalties to denial of utility connections to, in extreme municipal actions, sealing.
For resale flats in older buildings, ask for the OC of the building; where it genuinely never existed (common in older stock), understand the regularisation status before pricing that risk in.
Some societies operate for decades without OCs. That is a fact about how common the risk is, not evidence that the risk is zero.

Under-construction: land and development documents

The most common root cause of stalled projects is not construction — it is the land underneath.

Who owns the project land? If the developer owns it, verify that title. If not, verify the registered development agreement / joint development agreement (JDA) between landowner and developer, and the landowner's title behind it.
Power of attorney granted by the landowner to the developer, if applicable.
Loans against the project land: the EC on the project land shows registered mortgages. A mortgaged project is normal; what you need is the lender's NOC for your unit at the time of your sale deed, releasing your flat from the charge.

Agreement to Sell vs Sale Deed

Two documents buyers persistently conflate:

	Agreement to Sell / Agreement for Sale	Sale Deed / Conveyance Deed
What it is	A promise to transfer in future, on terms	The actual transfer of ownership
When	At booking / during construction	At possession / completion of payment
Ownership transfers?	No	Yes
Registration	Registered (mandatory for under-construction under RERA)	Registered, with stamp duty

Until the sale deed is registered, you are a contractual claimant, not an owner. Read the agreement for sale for: the exact entity you are contracting with (why the entity matters), the delivery date and delay compensation, the carpet-area definition and price-per-carpet basis, the escalation and cancellation clauses, and what happens to your payments on default — in both directions.

Sequencing: when to verify what

Before token: RERA check, developer check, EC, and at minimum a preliminary read of title documents. The token converts every later discovery into a sunk-cost negotiation.
Before signing the agreement: full title search and advocate's opinion; approvals; land/JDA documents for under-construction.
Before the sale deed: updated EC (fresh charges can appear between agreement and deed), lender NOC where applicable, OC for ready property, and tax/dues clearances.
After registration: mutation in your name, and preservation of every original.

Common mistakes buyers make

Accepting photocopies and sales-office "document files" as verification.
Ordering the EC for the default period instead of the longest available.
Treating the agreement to sell as ownership.
Skipping the land documents on under-construction purchases because "the towers are already up."
Not obtaining the lender's NOC on a mortgaged project before the sale deed.
Buying resale without asking why the building has no OC.
Doing everything right and then never completing mutation after purchase.

Questions you should ask before buying

Can I have certified copies (not photocopies) of the title documents, and does the chain run unbroken for 30 years?
What does the longest-period encumbrance certificate show?
Does the built structure match the sanctioned plan?
Where is the Occupancy Certificate — and if it does not exist, why?
Who owns the project land, and is the development agreement registered?
Is the project land mortgaged, and will the lender's NOC for my unit be provided at the sale deed?
Which legal entity is named in the agreement, and what do its delay and default clauses actually say?

Frequently Asked Questions

What documents should I check before buying a flat in India?

The title documents and 30-year chain, encumbrance certificate for the longest available period, sanctioned building plan, RERA registration for under-construction projects, Occupancy Certificate for ready properties, land and development agreement documents where the developer is not the landowner, and the agreement for sale itself — each verified against the issuing authority's records.

What is the difference between OC and CC?

The Completion Certificate certifies that construction was completed in accordance with the sanctioned plan; the Occupancy Certificate certifies the building is fit for occupation. Exact terminology and sequence vary by state, but for a buyer the OC is generally the document that makes moving in legal.

Is it safe to buy a flat without an Occupancy Certificate?

It carries real risk: potential penalties, difficulties with utility connections and financing, and exposure to municipal action. Older buildings without OCs are common, but commonness is not safety — understand the regularisation position and price the risk consciously, or walk away.

What is an encumbrance certificate and why does it matter?

The EC lists registered transactions — sales, mortgages, releases — against a property for the period it covers. It is how you discover registered loans and prior transfers the seller did not mention. Obtain it yourself, for the longest period available, and remember it cannot show unregistered claims or pending litigation.

Does registration of the sale deed mean the title is clear?

No. Registration records that a transaction occurred; it does not certify the seller's ownership was valid. Clear title is established by the title search across the chain of prior documents — which is why the advocate's title opinion, not the registration event, is the safeguard.

Do I need a lawyer to buy property in India?

For the title search and document review, a property advocate is strongly recommended for every purchase and effectively essential for resale flats, independent houses and land. The fee is trivial relative to the risk screened. The public-record checks in this guide you can and should also do yourself.

Instead of chasing each document and authority separately, buyers can consolidate the legal, RERA, developer, location and price factors for a specific property into a single property intelligence report. Generate a Property Report for the property you are considering.