An Individual Taxpayer Identification Number is a nine-digit number the IRS uses to process taxes and administer tax laws.

A tax identification number (TIN) is a nine-digit number that's needed to file federal tax returns. For most individuals, it's their Social Security number.

When contacted, Md Nurul Islam, BRTA director (engineering), said his office now receives TIN certificates and records the number. "But we are yet to start verifying TINs." ...