The short answer
Check the manufacturer’s own dealer locator, insist on invoices with batch details, and compare against official specification sheets.
The reliable source is the manufacturer, not the shopfront: use their published dealer locator or helpline. Ask for a GST invoice carrying product and batch details.
Counterfeit tiles, electricals and hardware are common in some markets. Cross-check the packaging, batch codes and technical markings against the official datasheet, and keep samples from the delivered lot.
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