Verify an interior contractor in a few hours, using free registers, references and a site visit.

A contractor background check does not need a lawyer or a paid service. Most of it uses free government registers, a phone and two visits. The routine below takes a few hours spread over a week. It removes the candidates who cannot prove who they are, and it gives you a written record for the ones who can.

Do these checks before you compare prices. A low quote from an unverified business is an unknown risk rather than a saving. The scam patterns guide explains why identity gaps are where most losses begin.

What can verification prove, and what can it not?

Verification proves that a business exists, that it is registered where it claims to be, and that named people did named work. It does not prove that the next project will be finished well or on time.

No check proves quality. Treat the routine as a filter for identity and honesty. Judge quality through scope, drawings and the contract, using the hiring guide.

Step 1: Do the names match?

Take the quote, the letterhead, the business card and any GST certificate the contractor shares. Write down the business name exactly as it appears on each. Then ask for the bank account name to which payments will go.

All of these should name the same entity. A quote from “XYZ Interiors” with payment to an individual’s personal account is the first gap to close. Ask why. A sole proprietor may legitimately bank in a personal name, but the quote and the GST registration should then also be in that name.

Record the PAN if it is offered. You cannot verify a PAN publicly, but a business that hesitates to write its PAN on a quote is telling you something.

Step 2: Does the GST number check out?

The GST portal offers a free, public taxpayer search at services.gst.gov.in. Enter the 15-character GSTIN from the quote.

Read the result carefully:

1. State code. The first two digits show the state of registration. Maharashtra is 27. A Mumbai contractor with a different state code needs to explain where the business actually sits.
2. Legal name and trade name. These should match the quote and the bank account from Step 1.
3. Status. “Active” is what you want. “Cancelled” or “Suspended” means the registration is not valid for charging tax.
4. Taxpayer type. “Regular” taxpayers can charge GST on invoices. “Composition” taxpayers cannot collect GST from customers. A composition taxpayer who adds 18 percent to your quote is charging tax they cannot collect.
5. Date of registration. A registration a few weeks old is not a problem in itself, but it does mean there is no track record under this name.

A contractor with no GSTIN is not automatically dishonest. Small businesses below the registration threshold operate legally without one. They must not charge you GST, and you should expect the quote to say so.

Step 3: Is the Udyam registration real?

Udyam is the government’s registration for micro, small and medium enterprises. Verification is free at udyamregistration.gov.in. Enter the Udyam registration number from the contractor’s certificate.

This check is optional. Udyam registration is self-declared. It confirms that the business registered itself as an MSME and states the activity it declared. It does not certify skill, staff, insurance or financial health. Use it only as one more confirmation that the business name and address are consistent.

Step 4: Is the professional what they claim to be?

Architects in India are registered with the Council of Architecture under the Architects Act 1972. If a person calls themselves an architect, ask for their registration number and check it on the Council’s register.

Interior designers have no statutory licence in India. Anyone can use the title. That is normal, and it means the title itself proves nothing, so your evidence must come from work, references and documents rather than from a credential.

For contractors, there is no national licence for interior execution. Some hold electrical contractor licences from the state licensing board for electrical work. Ask who will do the electrical work and whether that person or firm is licensed.

Step 5: What should you see at the office or workshop?

Visit the address on the quote. You are not judging the decor. You are confirming that the business operates from where it says it does.

Look for:

• A working office with people, files and drawings, not a shared desk booked for the meeting.
• For contractors with a carpentry workshop, machines in use and material stock with supplier labels.
• The names on the door or signage matching Step 1.
• Someone other than the salesperson who can answer a technical question.

A contractor who works from home or from site is common in Mumbai. That is fine if the quote and the GST registration say so. The gap to watch is a claimed office that does not exist.

Step 6: What should you check on a live site?

Ask to visit a project currently under way. Arrange to speak with the client, not only the site supervisor. A contractor with active work who refuses a site visit is declining the cheapest form of proof.

At the site, observe:

• Whether material on site carries supplier labels and matches what the client was quoted.
• Whether a drawing is present and being followed.
• How the site is protected, cleaned and secured each evening.
• Whether the supervisor named to you is actually present.

Ask the client three questions: Is the payment schedule running ahead of or behind the work? Have there been changes to materials or price since signing? What happened the last time something went wrong?

Step 7: What should you ask completed references?

Ask for two completed projects with a direct phone number for each client. A reference reachable only through the contractor’s phone is weaker evidence.

Ask about money and problems, not about the finish:

1. Did the final bill match the quote? If not, what changed and who asked for the change?
2. Were payments linked to work stages, and did the contractor ever ask for money early?
3. Did any material change after approval, and how was it handled?
4. How long after the promised date did handover happen?
5. Were defects fixed after handover, and how many reminders did it take?
6. Would you use the same contractor for a second project?

The questions to ask an interior designer guide gives further reference questions that apply to any professional.

Step 8: Does the portfolio belong to the contractor?

Pick two photographed projects from the presentation. Ask for one drawing, the BOQ or quote, and one supplier invoice from each. Personal details can be blacked out.

A contractor who executed the work will have this paper. A contractor who did a small part of it, or none of it, will not. The scam patterns guide explains how borrowed portfolios are used.

Ask specifically what the contractor’s own scope was on each project. Design only, execution only, or both. Photographs do not show scope.

Step 9: What does the online footprint tell you?

Search the business name, the proprietor’s name and the phone number together. Read reviews on more than one platform. Look for patterns in the complaints rather than the star count. A single angry review proves little. Three reviews describing the same payment problem deserve a question.

Court records are partly searchable through the eCourts services portal, which lists cases by party name across many Indian courts. Search results have limits. Common names return unrelated cases, records may be incomplete, and a case shows only that a dispute exists, not who was right. Use a court result as a question for the contractor, not as a verdict.

The problems and complaints guide explains how to read reviews for evidence rather than emotion.

Step 10: Write the verification record

Put every result on one page. The record is your evidence if something goes wrong later, and it makes the comparison between candidates honest. Copy the table below for each contractor.

Keep the record with the signed contract. If the project later reaches a dispute, this page shows what you were told and when. The dispute and legal recourse guide explains how that evidence is used.

How does verification change the appointment?

Only compare quotes from contractors who cleared the record. Then write the verified facts into the contract: the legal entity, the GSTIN, the bank account, the named supervisor and the two reference projects. The contract guide shows where each fact belongs.

Tie the first payment to named purchases, not to a percentage. The advance payment rules explain how. For site carpentry, where identity is often only a phone number, the carpenter hiring guide adapts this routine to smaller trades.

How does Interio’s directory fit in?

The Mumbai interior contractors directory and the designers directory list practices with a published official website and a dated source check. The listing methodology explains exactly what that check covers and what it does not.

A listing confirms that a public record exists. It does not complete Steps 1 to 10 for you. Treat every directory, including this one, as the start of your own record, not a substitute for it.

Interior Contractor Scams in India: How They Work and How to Avoid Them

How does the advance payment trap work?

The contractor asks for a large upfront payment “to book materials and the team.” Work starts quickly, which builds trust. Then the site slows. Calls are answered less often. A second payment is requested to “release” work that the first payment should already have covered.

By now the owner has paid for work that does not exist and has no signed record of what the advance bought. The site is half demolished, so switching contractors means paying twice for mobilization. Most owners pay the second instalment to keep things moving.

Red flags in the first meeting:

• The advance is quoted as a round percentage of the total, not as the cost of named items.
• The contractor cannot say which purchase the advance funds or when those goods reach the site.
• Payment is requested to a personal account or through a cash transfer with no receipt.
• Urgency is used: “the rate is valid only this week” or “the carpenter is free only if we start Monday.”

The document that prevents it is a payment schedule where each amount has a trigger you can see. The contract guide explains how to write one. You keep leverage until the first payment. After that, leverage depends entirely on how much work stands on site against the money paid.

How does material substitution happen after approval?

The approved sample is marine-grade plywood with a branded laminate and soft-close hardware. The delivered board is a lower grade with a similar surface. Once laminate covers it, nobody sees the difference until the shutters warp or the hinges fail.

Substitution happens because the material schedule is never written, or nobody checks the delivery against it.

Red flags:

• The quote names a material type but not a brand, grade or Indian Standard mark.
• The contractor buys everything and resists an owner purchase of major materials.
• Deliveries arrive at the site without an invoice or before you are told.
• “Same quality, different brand” is offered as a favour to save time.

The document that prevents it is a material schedule with the approved sample, brand, grade and the invoice that must accompany each delivery. The material selection guide explains how to build it. The plywood grade fraud check explains what to look for on the board itself. You keep leverage while the material is still visible. After lamination and installation, your only remedy is a dispute.

How is GST used as a scam?

The quote adds 18 percent GST to the total. The invoice shows a GSTIN, or no GSTIN at all, and the tax amount goes into the contractor’s pocket rather than to the government. In a related pattern, the contractor holds a composition-scheme registration, which does not allow collecting GST from customers, but charges it anyway.

Another version splits the invoice. A small official bill carries GST. A large cash component is offered “to save you tax.” The owner then has no invoice for most of the project and no evidence for a consumer complaint later.

Red flags:

• GST is charged but the quote or invoice shows no 15-character GSTIN.
• The GSTIN state code does not match the office state. Maharashtra is 27.
• You are offered a lower total for cash without any invoice.
• The business name on the quote differs from the name on the GST registration or the bank account.

The prevention is a two-minute check on the GST portal search, which is free and public. Confirm the registration is active, the trade name matches and the taxpayer type is regular, not composition. Composition taxpayers cannot collect GST from you. The verification routine walks through this check. Your leverage is complete before the first invoice is paid, and mostly gone afterwards.

How do fake portfolios and staged references work?

The presentation shows twenty finished homes. The images come from stock sites, another firm’s website or a project the contractor barely touched. The reference you call is a relative or colleague who says the right things.

Red flags:

• Images have no address, date or client permission behind them.
• The contractor cannot show a drawing, quote or invoice for any photographed project.
• Every reference is reachable only through the contractor’s phone.
• The reference cannot describe the payment schedule, delays or defects on their project.

The prevention is to ask for the paper behind two photographed projects: a drawing, the BOQ and one supplier invoice. Ask the reference about problems and money, not about the finish. The hiring guide lists specific reference questions. You hold full leverage at this stage because nothing has been signed.

Red-flag checklist for the first meeting and first quote

Print this list and mark each row before you pay anything.

What should you do if you recognize a pattern already underway?

First, stop new payments until the paper catches up with the site. Stop in writing, with a dated note listing what has been paid and what stands on site.

Second, assemble the evidence file: quotes, messages, bank records, dated photographs and every invoice. The problems and complaints guide explains how to organize it.

Third, decide whether the relationship can continue. A contractor who accepts a rebalanced schedule and documents the material is worth keeping. One who refuses to put anything in writing is telling you the answer. For the steps after a breakdown, read the dispute and legal recourse guide.

Related project decisions

• BOQ guide
• quotation guide
• turnkey interiors guide
• designer versus contractor guide