At the end of an internship, students usually ask for "the certificate". Sometimes they mean a completion certificate, sometimes an experience letter, sometimes a recommendation for a master's application. These are different documents with different purposes, and issuing the wrong one, or issuing one carelessly, can create problems for you later. This guide explains each, what to put in it, and the checks to run before you sign.
Three documents, three jobs
| Document | Purpose | Who reads it | Tone |
|---|---|---|---|
| Completion certificate | Confirms the internship happened: dates, role, completion | College, future employers | Factual, brief |
| Experience letter | Describes the work done and skills used in more detail | Future employers, background checks | Factual, specific |
| Letter of recommendation (LOR) | A personal endorsement of the intern's ability and character | Universities, scholarship panels, employers | Evaluative, signed by someone who supervised them |
Every intern who completes the internship should get the completion certificate. Offer an experience letter for longer internships (three months or more) or where the intern did substantial independent work. Write an LOR only on request, and only if you can honestly recommend the person.
What to include in a completion certificate
- Company name, letterhead, and a unique reference number.
- Intern's full name as on their college records.
- Role title and team.
- Exact start and end dates, and whether it was full-time, part-time, remote or in-office.
- One or two lines on the main projects or responsibilities, in concrete terms.
- A statement that the internship was completed.
- Name, designation and signature of an authorised person, and the date of issue.
Our internship completion certificate template has this structure ready. Avoid adjectives you cannot back up; a certificate is a record, not a reference.
What to include in an experience letter
An experience letter goes further. Add the specific projects, tools and outcomes: "Built a lead-tracking sheet used by the sales team", "Wrote and published 14 blog posts", "Tested 60 app screens and logged defects in the team tracker". Mention the stipend only if the intern asks and your policy allows it. Keep it factual and verifiable; a hiring manager who calls you should hear the same thing the letter says. If you used a structured review, your notes from the intern performance review template or the internship evaluation form make this letter quick to write.
Writing a useful recommendation letter
A good LOR is written by the person who actually supervised the intern and gives specific examples. Structure it in four short parts: how you know the intern and for how long; two or three examples of work and what they show; how the intern compares with others you have supervised, if you can say so honestly; and a clear closing recommendation. If you would only write something lukewarm, it is kinder to say so and suggest the student ask someone else. Never sign a letter drafted by the student without reading and editing it; your name is on it.
Plan ahead so you have material to draw on. Keep brief notes during the internship: tasks completed, feedback given, moments where the intern showed initiative. A mid-point review using the performance review template gives you the raw material for both an experience letter and an LOR. Universities abroad often ask recommenders to rate the student on specific traits, so be prepared to answer questions about analytical ability, communication and teamwork with concrete examples rather than general praise.
When to issue, and when not to
Issue the completion certificate within a week or two of the last day. Students often need it for college submissions or job applications, and a delay reflects badly on you. Set this expectation in the offer letter with a line such as "a certificate will be issued on satisfactory completion".
Do not issue a completion certificate for an internship that was not completed. If an intern left early, you can issue a letter that states the actual dates worked and the work done, without calling it a completion. Do not backdate, extend dates, or add projects the intern did not do, even if asked politely. Inflated documents can be exposed in background checks and put your company's credibility at risk. If the internship ended for misconduct, keep the document strictly factual and take advice before writing anything evaluative.
Verification: make your documents checkable
Employers and colleges increasingly verify certificates. Make that easy and make forgery hard:
- Give every certificate a reference number and keep a simple register (name, role, dates, reference number, issuer).
- Issue from a company email address and on letterhead, preferably as a signed PDF.
- Nominate one person to answer verification requests.
- Confirm only what is on record: dates, role and completion status.
- Keep the register for several years; former interns will ask for copies.
Write your certificate rules into your internship policy so every manager follows the same process: who signs, the turnaround time, the format, and what happens when an internship ends early. Consistency matters when you hire across teams or cities, and it protects you if a document is ever questioned. If a college sends its own certificate format, you may fill it in, but check that every field is accurate and keep a copy in your register.
Turn the ending into a hiring decision
The end of an internship is also your best moment to decide on a full-time offer. If the intern performed well, the certificate and a pre-placement offer can go out together. Read the intern-to-full-time conversion guide, use the guide on evaluating interns for a fair decision, and see our PPO guide for employers. The intern-to-full-time ROI calculator helps you judge whether converting makes sense financially.
Build it into your internship programme
If you hire interns every year, put certificates into your standard process instead of handling them one by one. Our guide to building an internship programme and the internship programme checklist include the end-of-internship steps. The structured internships guide explains why a consistent process helps your brand on campus. Many employers plan the next intake around graduating batches; see hiring 2026 graduates and hiring college students. When you are ready, hire interns by role or post your next internship, and read our first-intern guide if you are new to this.
Frequently asked questions
What is the difference between an internship certificate and an experience letter?
A completion certificate is a short factual record of the role, dates and completion. An experience letter describes the work done and skills used in more detail and is usually issued for longer or more substantial internships.
Should I give a certificate if the intern left early?
Do not issue a completion certificate for an incomplete internship. You can issue a factual letter stating the actual dates worked and the work done, without describing it as completed.
Who should sign an internship certificate?
An authorised person such as a founder, HR head or the intern's manager, with name and designation. For recommendation letters, the person who directly supervised the intern should sign.
How do I handle verification requests for old interns?
Keep a register of every certificate issued with a reference number. When a verification request comes in, confirm only what is on record, such as dates, role and completion status.
More hiring guides
- Hiring interns at an early-stage startup
- Hiring freshers in tier-2 cities
- Interview questions to ask interns
- How to hire a fresher data analyst
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