Historical clue formulations

• They never start with 9: Abbr. — 2026-09-06
• Former Medicare IDs — 2026-07-03
• Old Medicare IDs — 2026-06-14
• Tax IDs — 2026-02-25
• Govt. IDs — 2025-12-16
• Taxpayer IDs — 2025-12-07
• IDs on W-2s — 2025-09-02
• Figs. most people have memorized — 2025-08-31
• Govt.-issued identifiers — 2025-08-25
• Employee IDs — 2025-08-18
• Identity thief's acquisitions, in brief — 2025-07-27
• Strings of digits to keep secret, in brief — 2025-07-14
• Figs. for which you often give just the last four digits — 2025-06-24
• Figs. with two dashes — 2025-06-11
• Phisher's collection, for short — 2025-06-07
• Strings with the pattern XXX-XX-XXXX, in brief — 2025-05-12
• IDs that will never start 000 or 666: Abbr. — 2025-03-23
• Nine-digit IDs — 2025-02-24
• Identity thieves' targets, for short — 2025-02-18
• IDs written on applications, for short — 2025-02-03
• Nine-digit government IDs — 2024-12-31
• Data sought in phishing attempts, in brief — 2024-09-22
• Frequently phished figs. — 2024-04-16
• IDs with multiple hyphens — 2024-04-03
• Tax form figs. — 2023-12-19
• Their first five parts are often disguised, for short — 2023-10-15
• Figs. for tax filers — 2023-08-28
• IDs since the Great Depression, in brief — 2023-08-03
• Govt. IDs — 2023-05-08
• Nine-digit IDs — 2023-04-16
• Tax IDs: Abbr. — 2023-02-06
• Figs. first issued in 1936 — 2022-11-27
• IDs since the Great Depression — 2022-10-06
• Tax IDs — 2022-09-05
• 1040 figs. — 2022-05-08
• Info collected by H.R. — 2022-01-19
• Figs. assigned randomly since 2011 — 2022-01-07
• Tax IDs — 2021-07-26
• Application figs. — 2021-06-20
• Info on tax forms — 2021-06-17
• Credit application figs. — 2021-05-23
• Some I.R.S. data, in brief — 2021-03-16
• Digital IDs — 2020-11-22
• Some sensitive info, for short — 2020-09-25
• IDs assigned at birth: Abbr. — 2020-08-16
• Entries on 1040s, for short — 2020-02-12
• 1040 figures, for short — 2020-02-02
• Payroll dept. IDs — 2019-11-27
• Figs. on tax forms — 2019-11-12
• Identifiers on tax returns: Abbr. — 2019-11-04