Historical clue formulations

• Traditional way to sign a contract — 2025-04-08
• Bold way to solve a sudoku — 2023-01-24
• How some will solve this crossword — 2021-10-27
• How checks are written — 2021-04-18
• Permanently — 2018-09-15
• Unerasably, say — 2017-09-19
• Bold way to solve a crossword — 2016-06-10
• How to sign a contract — 2013-06-03
• Indelibly written — 2011-03-16
• Permanently, as writing — 2011-01-17
• Way to fill out a form — 2008-12-05
• One way to solve a crossword — 2008-06-11
• Permanently written — 2007-07-24
• Permanently — 2004-10-31
• Permanently — 2004-09-11
• Confident way to solve crosswords — 2004-08-04
• Permanently — 2003-06-29
• How checks are signed — 2002-01-28
• How to sign a contract — 2000-12-17