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Locate company mobile by GSTIN for audit balance confirmations
Locate company mobile by GSTIN for audit balance confirmations: reach the right finance person at each debtor or creditor, independent of the client.
GST Identification Number
27ABCDE1234F1Z0
- Legal nameSample Traders Pvt Ltd
- StateMaharashtra (27)
- RegistrationActive
- Phone+91 98XXX XXXXX
- Emailc****@example.com
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Reading time 8 min
Last reviewed August 2026
Locate company mobile by GSTIN is a practical need for auditors at year end. External confirmations of receivables and payables are a standard audit procedure: the auditor asks a sample of the client’s customers and suppliers to confirm the balances they owe or are owed. Response rates in India are often low. Confirmation letters go to generic addresses, sit unanswered in inboxes or reach people with no authority to reply. A mobile for the finance contact at each counterparty can transform response rates, but auditing standards require that the auditor control the process, which means the contact details cannot simply be taken from the client without checks. This guide explains how audit teams locate and use company mobiles while keeping the confirmation process independent.
Why confirmations matter and why they stall
Confirmations provide audit evidence from a source outside the client, which is generally more reliable than evidence produced by the client itself. They help detect overstated receivables, fictitious customers, unrecorded liabilities and disputed balances. When counterparties do not respond, auditors must perform alternative procedures, such as checking subsequent receipts or underlying invoices, which take more time and may provide weaker evidence.
The main reason confirmations stall is reaching the wrong person, or no person at all. A letter to the general office of a large company may never reach accounts payable. An email to an old address bounces. A request to a small trader’s shop goes unread.
The independence problem
Auditing standards require the auditor to maintain control over confirmation requests: selecting the counterparties, sending the requests and receiving responses directly. If the client supplies counterparty contact details, the auditor must consider whether those details are reliable. A client attempting to conceal fraud might give the auditor contacts that lead to an accomplice who confirms a fictitious balance.
So while the client’s records are a natural starting point for counterparty contacts, the auditor needs to validate them, and for higher-risk balances, to locate contacts independently.
Using the GSTIN to anchor each counterparty
Most business counterparties in India are registered for GST, and the client’s ledgers usually hold their GSTINs. The auditor can check each GSTIN on the public taxpayer search, confirming the legal name, status and declared addresses independently of the client. A counterparty whose registration is cancelled, whose legal name differs from the ledger name, or whose address does not match the client’s records deserves closer attention.
The GSTIN also helps detect related parties and fictitious entities. A counterparty with a recent registration, an address matching the client’s own premises or a director in common with the client may warrant further procedures.
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Locating finance contacts independently
Phone numbers are absent from the public GST view, since the portal keeps contact data private. To find independent contacts, the auditor can use the counterparty’s website, corporate registry records for incorporated counterparties, published annual reports for larger companies, industry directories and compiled business contact data matched to the GSTIN. These sources typically provide a main office number or general email.
The auditor then calls the main number, explains that a confirmation request is being sent and asks for the person responsible for the client’s account in accounts receivable or payable, along with their email and mobile.
Comparing client-provided and independent contacts
For each selected counterparty, compare the contact details in the client’s records with those located independently. Where they match, the client’s details gain credibility. Where they differ, use the independent ones for sending requests, or investigate the difference. A client-provided mobile that turns out to belong to someone outside the counterparty is a serious red flag.
Document the comparison in the working papers, showing how contacts were validated.
Using mobiles to improve response rates
Once a finance contact is identified, a brief call or message to their mobile can alert them that a confirmation request is coming, explain what is needed and ask them to respond directly to the auditor. This simple step often lifts response rates sharply, especially for mid-sized and smaller counterparties.
The confirmation itself should still be sent in writing, typically by email from the audit firm or through a confirmation platform, with the response coming back directly to the auditor. The mobile call supports the process; it does not replace the written confirmation.
Confirming the responder's identity
When a response arrives, the auditor should consider whether it genuinely comes from the counterparty. Responses from generic webmail addresses, from domains that differ from the counterparty’s website, or from people the auditor cannot connect to the counterparty need follow-up. A call to the independently located main number, asking to verify that the named person sent the response, resolves doubts.
Handling small counterparties
Small traders and proprietorships often have no finance department. The proprietor handles everything, and their business mobile is the practical contact. Independent sources include shop board numbers, map listings and trade association lists. A call to the proprietor explaining the request, followed by a simple written confirmation they can sign and return, often works better than a formal letter.
The auditor should still confirm that the mobile reaches the proprietor of the business matching the GSTIN, not a relative or agent of the client.
Selecting the sample with GST signals in mind
Sample selection is normally driven by balance size and risk, but GST information can sharpen it. Counterparties with cancelled or suspended registrations, very recent registrations, addresses that coincide with the client’s premises or with each other, or legal names that differ materially from ledger names are worth including in the sample even if their balances are modest. These features do not prove anything is wrong, but they are the patterns most often associated with fictitious or related-party balances.
Record why each counterparty was selected. When the working papers show that GST signals informed the selection, reviewers can see that the procedure was designed with fraud risk in mind.
Payables confirmations and unrecorded liabilities
Confirmations of payables serve a different purpose from receivables: they help detect liabilities the client has not recorded. Auditors often select suppliers with small or nil balances, because a supplier showing a zero balance in the client’s books but a large amount outstanding in its own is exactly what the procedure aims to catch. For these suppliers, reaching the accounts receivable contact, the person who tracks what the client owes them, is essential. A mobile for that person, located through the supplier’s main line, makes a response far more likely.
Positive versus negative confirmations
Positive confirmations ask the counterparty to reply in all cases, stating whether they agree with the balance. Negative confirmations ask for a reply only if they disagree. In India, negative confirmations give weak evidence because non-response is so common, and auditors generally prefer positive confirmations for material balances. The extra effort of locating mobiles and following up pays off precisely because positive confirmations need actual replies.
Non-responses and alternative procedures
Even with good contacts, some counterparties will not respond. Document every attempt: emails sent, calls made, dates and outcomes. For non-responses, perform alternative procedures such as examining subsequent cash receipts, shipping documents, invoices and the counterparty’s own reporting where available. GST data can support these procedures: invoices reported by the client to the counterparty, and the counterparty’s own reporting of purchases where accessible with consent, offer additional evidence about the existence and value of transactions.
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Timing the confirmation exercise
Year end is the busiest time for finance teams at counterparties, who are closing their own books and handling their own auditors. Requests sent in the first weeks after year end compete with all of that. Where the audit plan allows, send confirmations as of an interim date, or send year-end requests promptly with a mobile call to the finance contact explaining the deadline. A finance executive who knows a request is coming, and who it is from, is far more likely to prioritise it.
Data protection and confidentiality
Counterparty contacts, especially individual finance staff mobiles, are personal data. Audit firms should use them only for the confirmation process, store them securely within audit files and apply retention rules consistent with professional requirements. Confirmation requests themselves contain confidential information about the client’s balances and should be sent only to verified recipients.
Building a reusable counterparty contact file
For recurring audits, the same major customers and suppliers appear every year. Keep a file of verified finance contacts for significant counterparties, linked by GSTIN, with the date and method of verification. Next year, start from this file, re-verify contacts and update those that have changed. This saves time while maintaining independence, since the contacts were validated by the audit team rather than taken directly from the client.
Technology and confirmation platforms
Electronic confirmation platforms are increasingly used, particularly for bank confirmations and larger corporate counterparties. They provide authenticated responses and reduce the risk of interception. For counterparties not on such platforms, the combination of independently located contacts, written requests and phone follow-up remains the practical approach.
A worked example from an audit team
An audit team selects forty receivable balances for confirmation at a manufacturing client. The client’s ledger provides GSTINs and contact emails. The team checks each GSTIN, finding two cancelled registrations and one counterparty whose legal name differs from the ledger. It locates independent main numbers for all selected counterparties and calls each to identify the accounts payable contact, collecting emails and mobiles.
For three counterparties, the client-provided email differs from the independently located contact. Requests are sent to the independent contacts. Mobile follow-ups lift the response rate well above the previous year’s. One response reveals a disputed balance that the client had not provided for. The two cancelled registrations and the name mismatch lead to further procedures, which uncover a misclassified related-party balance. The team records all verified contacts in a file for the following year.
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- Why confirmations matter and why they stall
- The independence problem
- Using the GSTIN to anchor each counterparty
- Locating finance contacts independently
- Comparing client-provided and independent contacts
- Using mobiles to improve response rates
- Confirming the responder's identity
- Handling small counterparties
- Selecting the sample with GST signals in mind
- Payables confirmations and unrecorded liabilities
- Positive versus negative confirmations
- Non-responses and alternative procedures
- Timing the confirmation exercise
- Data protection and confidentiality
- Building a reusable counterparty contact file
- Technology and confirmation platforms
- A worked example from an audit team
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Disclaimer: GST To Phone Number is an independent data service. We are not affiliated with, endorsed by or connected to the Goods and Services Tax Network, the Central Board of Indirect Taxes and Customs, or any government department. GSTIN verification should always be confirmed against the official GST portal. Contact data is provided for legitimate business use and must be used in line with applicable telecom, privacy and data-protection rules.