Ruth Wooderson, an HR leader whose writing I follow, sends her team a weekly love letter. In writing. Every week. She uses the phrase "love letter" and offers no apology for it.
My first reaction was a flinch.
My second reaction was worse, because it was honest. I never did it. Not once, in all the years I ran engineering teams. I praised people all the time... out loud, in the moment, in a corridor, on a call, at the end of a demo. Then those people moved on, and they took nothing with them but a warm feeling with no shape to it.
Spoken praise evaporates. I said thousands of good things to good people. Most of them remember a vibe, not a sentence.

Two out of three people went invisible this week
Gallup found only one in three US workers strongly agree they received recognition or praise for good work in the past seven days.
Flip it over. Two out of three people put in a full week of decent work and heard nothing about any of it.
I used to think I was the exception to this. I wasn't. I was generous with praise and terrible at making it stick. A hallway "nice work on the release" costs you four seconds and buys the other person about four seconds of feeling good. Then a Jira ticket lands and it's gone.
In my own research on bad bosses, 99.5% of respondents told me they'd had one or more types of bad boss. Almost nobody escapes. And when I dig into what made a boss bad, cruelty comes up far less often than absence. Nobody noticed. Nobody said anything. The work went into a hole and the hole never spoke back.
Written praise gets kept
Here's the difference between what I did and what Ruth does.
Nobody keeps a hallway compliment. People keep paper. People keep emails. I've watched someone pull a folded note out of a desk drawer from a manager they left eight years earlier.
Ask the next five people you work with whether they've kept something written from an old boss. At least one of them goes quiet, then goes and finds it.

Written praise survives the week it was written in. It survives reorgs, layoffs, a bad quarter, a new manager who doesn't know your history. On the worst day of somebody's year, it's still in the drawer.
Spoken praise has one more problem. It's deniable. If your only record of somebody's excellent year lives in your memory, then your memory is the promotion case. Memory is a terrible advocate. It compresses ten months into "solid" and forgets the Tuesday night the migration went sideways and one person stayed to fix it.
Writing forces you to be specific
This is the part I underrated for years.
Saying "great job this week" out loud is easy because it's empty. Writing "great job this week" down looks pathetic on the page, and you know it as you type it. The page shames you into detail.
So you go looking. What did they do? Which day? What happened next? And in going looking, you find out whether you were paying attention at all.
Specific praise proves you watched. Generic praise proves the opposite. Everyone on the receiving end knows the difference within one line.
Gallup's research on where memorable recognition comes from puts the direct manager at 28% and a senior leader or CEO at 24%. So write it, send it to the person, and copy their skip-level. You've turned a private note into two of the top sources of recognition at once, for the cost of one extra name in the To field.
The business argument, for anyone who needs one
I'd rather do this because it's decent. But some of you report to someone who wants a number.
Gallup and Workhuman found well-recognized employees were 45% less likely to have turned over two years later. The same research found people who strongly agree they get valuable feedback from the people they work with are five times as likely to be engaged.
Work out what one unplanned resignation costs you in recruitment fees, notice periods, ramp-up time, and the six months of half-speed while somebody new learns your codebase. Then set it against seven minutes on a Friday afternoon.
Why we don't do it
Three excuses, and I've used all three.
"No time." Seven minutes. One person a week, or your whole team once a week. If seven minutes a week is beyond your calendar, your calendar is the article you should be reading instead.
"It'll look soft." This one ran me for years and I was wrong about it. Vague praise looks soft. Detailed, evidenced praise reads like a performance review written by someone who was awake. Nobody has ever read a specific written commendation and thought less of the sender.
"It's not fair to the others." Fairness means looking at everybody, not praising everybody identically for unequal work. If you're worried one person gets noticed more, the fix is to look harder at the quiet ones, not to stop writing. Silence isn't neutral. Silence lands hardest on the people who never self-promote.

How to write one
Rules I'd give myself if I got those years back.
Name the person, the thing, and the effect. Not "you've been great lately". Try "you rewrote the import script on Tuesday after the vendor changed the schema with no notice, and the release went out on time because of it."
Date it. A dated note is evidence. An undated note is a mood.
Attach no ask. Praise with a request stapled to the bottom is a request. Send the ask on Monday.
Send it to them, copy their skip-level. Praise up the chain does work the person cannot do for themselves.
Weekly beats annual. Nobody remembers what they did in March by the time your appraisal cycle wheezes into November. Recognition delayed nine months isn't recognition, it's archaeology.
Never template it. The instant your team spots a mail merge, every note you've ever sent gets retroactively downgraded. One real paragraph beats a beautiful system.
Write it for the drawer. Assume they'll read it again in three years, on a bad day, in a different job. Write the version worth keeping.
What I'd do differently
I gave people a good decade of encouragement and left almost no trace of it. Somewhere out there are engineers who did outstanding work for me and hold nothing they'd show their next boss, or their kids, or themselves at 2am when the imposter voice starts up.
My fault, and mine to own. It's fixable for you.
Ruth calls hers love letters. Call yours whatever gets you past the flinch... a note, a Friday email, a receipt for good work. The label doesn't matter. The paper trail does.
So: who on your team has been doing good work for a year, and has nothing in writing to prove it? Write to them first, before Friday.