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Guide: Letters of Recommendation
What makes a strong recommendation letter and how to write one that actually helps
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What it is and when to write one

  • A letter of recommendation is a formal endorsement of a person's character, skills, or work, written by someone in a position of authority or relevant expertise.
  • Strong recommendation letters go beyond 'this person is good' to provide specific evidence. A generic endorsement carries little weight; a specific, evidence-based one can be decisive.
  • Write one when you can do it genuinely: university applications, job endorsements, scholarship or fellowship nominations, professional certifications.
  • Decline when you cannot write a positive letter. The honest and professional response to 'would you write me a reference?' when you cannot do it well is: 'I don't think I'm the best person for this.' A lukewarm letter can harm the candidate.
  • The writer's credibility matters. A letter from a direct manager who observed the work daily is worth more than one from a senior leader who met the candidate twice.

What it must include

  • Your name, role, organization, and your relationship to the candidate. How long you have known them and in what capacity.
  • Specific examples of work or behavior: a project they led, a problem they solved, a result they produced. Numbers, if available.
  • An assessment of their specific strengths in the context of what they are applying for. The letter should speak to the opportunity, not only describe the person.
  • A clear, direct endorsement. 'I recommend this person without reservation for this role' is a different statement from 'I believe they would be a strong candidate.'
  • Your contact details and an offer to discuss further. This signals that you stand behind what you wrote. Source: common admissions and hiring practice.

People also ask

What is the difference between a recommendation letter and a reference letter?

The terms are often used interchangeably but there is a distinction in practice. A recommendation letter is typically proactive and evaluative: the writer makes an argument for why the person is exceptional, often for a specific purpose (a graduate school application, a competitive fellowship). A reference letter is typically responsive and factual: it confirms dates of employment, role responsibilities, and character when requested. Recommendation letters require more evidence and argument; reference letters require accuracy and clarity.

How specific should examples be in a recommendation letter?

Very specific. "Jordan is a strong communicator" is not useful. "Jordan presented our Q3 roadmap to the board with 48 hours of preparation and handled five challenging questions that I would have struggled with myself" is useful. Specific examples are more credible, more memorable, and more likely to be believed. Before writing, ask the person what they want you to emphasize and what they will be evaluated on. Then provide the evidence that speaks directly to those criteria.

How long should a letter of recommendation be?

For academic applications: one page, single-spaced, 400-600 words. For job references: half a page to one page. For fellowship or scholarship applications: one to two pages, 600-1,000 words, particularly if the letter is a primary evaluation criterion. Length signals investment: a 100-word letter reads as reluctant. A two-page letter for a first job application reads as unusual. Calibrate to the purpose and the importance of the recommendation to the outcome.

What should you do if you cannot write a genuinely positive recommendation?

Decline. The most professional thing you can do is say "I don't think I am in the best position to give you the strongest possible letter for this purpose, but I am happy to suggest who might be." A tepid or qualified recommendation is often worse than no recommendation at all, because experienced readers know how to read between the lines. If you feel obliged to write one despite reservations, focus only on genuinely positive aspects and leave out the weaknesses; if you cannot do that honestly, you should not write it.

How recent should a letter of recommendation be?

For university and graduate school applications, many programs prefer letters written within the past 12 months. For professional job applications, a letter from 1 to 2 years ago is generally acceptable if the relationship it describes is still relevant. A letter describing work from 5 or more years ago is significantly weaker unless the writer has maintained the relationship. Always check whether the institution or employer states a recency requirement. Source: common admissions practice.

Letter of Recommendation Template

Letter of Recommendation
Recommendation for Jordan Clarke
Sarah Chen
Chief Product Officer, Lumio Inc.
sarah@lumio.com  ·  +1 555 000 0001
14 June 2026
To:
Admissions Committee
Stanford Graduate School of Business
Dear Admissions Committee,
I am writing to recommend Jordan Clarke for your MBA program without reservation. I have worked with Jordan as their direct manager at Lumio Inc. for the past three years, overseeing their work as Senior Product Manager on our core analytics platform. In that time I have seen capabilities that I rarely encounter in a single person.
What distinguishes Jordan is not technical skill, though that is strong, but strategic clarity under pressure. When our analytics suite launch was facing a scope crisis six weeks before GA, Jordan produced a prioritization framework in 48 hours that the engineering team, sales team, and board could all get behind. We shipped on schedule. That level of synthesis · taking disparate perspectives and making a decision that earns genuine buy-in · is the specific skill that distinguishes good product managers from exceptional ones. I have seen three product managers in my career do this instinctively. Jordan is one of them.
I am also compelled to note Jordan's conduct under scrutiny. When the initial launch metrics were disappointing, Jordan wrote a transparent post-mortem that was shared company-wide, accepted accountability without defensiveness, and proposed specific changes. Within 90 days, daily active usage was 40% above the revised target. That is the behavior of someone who will lead, not just manage.
I recommend Jordan Clarke with full confidence. I am happy to speak further. Please contact me directly at sarah@lumio.com.
Sincerely,
Sarah Chen
Chief Product Officer, Lumio Inc.

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