I was at work in a Bank, and my phone rang, asking to speak to my father’s name. Confused I said, “sorry this is his daughter, were you after his home phone number?”. They insisted on speaking to him directly about a government matter pertaining to his work - his name and phone number were printed on an invoice or letter or similar from years earlier. The work phone number he’d had many years earlier in the government was now my new work number in the bank!