What is the correct business letter format?

Sender address, date, recipient address, a salutation naming a person where possible, a subject line, the body in short paragraphs, a complimentary close, and your signature block. Block format — everything left-aligned with a blank line between paragraphs — is the safe default.

Should I send a letter as PDF or Word?

PDF, unless the recipient asked for an editable file. A PDF renders identically on every device, cannot be altered accidentally, and is what HR and legal teams expect to file. Send Word only when someone must fill something in.

How formal should the tone be?

Match the reader, not the occasion. Resignation, offer, and legal letters stay formal and factual. Thank-you and cover letters can be warm, but never casual — no contractions in the opening line and no exclamation marks in the body.

Do I need to sign a letter I send by email?

Include a typed signature block at minimum. For letters that carry weight — offers, resignations, experience certificates — attach a signed PDF. A scanned signature pasted into a Word file is easy to forge and increasingly rejected by verifiers.

Free Letter & Email Templates

From cover letters to resignation letters, find the right words fast. Browse 67 templates for every professional letter and email you'll ever need to send.

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Sarah Jenkins

266 Peachtree Road, Suite 317, San Francisco, CA 94105

hello@sarahjenkins.com

+1 (555) 749-9743

LETTER OF APPRECIATION

Alex R. Morgan

123 Maple Street | hello@sarahjenkins.com

2026-07-01

Ms. Rebecca Hayes, Brightpath Consulting Group

55 Fruit St, Boston, MA 02114

RE: Application for Senior Software Engineer Position

Dear Ms. Rebecca Hayes,

I wanted to take a moment to express my heartfelt thanks. Your support over the past months has meant a great deal to me, and I did not want the milestone to pass without telling you so directly.

In particular, I am grateful for the mentorship and thoughtful design reviews you offered throughout my project. Your feedback consistently pushed my work to a higher standard, and the time you invested in explaining the why behind each suggestion is something I genuinely valued.

Thanks to your guidance I not only delivered a stronger result but also grew as a professional in ways that will stay with me. Generosity like yours, given freely and without expectation, is rare and never forgotten.

I sincerely hope we can stay in touch, and I would love the chance to collaborate again on future open-source work whenever the timing is right. Please do not hesitate to reach out if there is ever anything I can do in return.

With sincere appreciation,

Sarah Jenkins

With sincere thanks and professional regards.

Sarah Jenkins

Free

Letters & Emails

Thank You Letter Template

Appreciation and gratitude letter structure for business partners, recruiters, or networking mentors.

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Jane Smith

248 Sansome Street, Suite 499, Chicago, IL 60601

hello@janesmith.com · +1 (555) 431-7517

Alex R. Morgan

123 Maple Street | hello@janesmith.com | +1 (555) 431-7517

2026-07-01

Customer Support & Returns Department, Jane Smith

55 Fruit St, Boston, MA 02114

Subject: Formal complaint regarding Order #ORD-882299

Dear Customer Support Team,

I am writing to formally register my dissatisfaction with a recent purchase and to request prompt resolution. On 2026-06-15 I ordered Templix Enterprise Edition (Annual Retainer) under Order #ORD-882299, and unfortunately the experience has fallen well short of what was promised at checkout.

Specifically, the API access keys I paid for were never delivered after my purchase confirmation. Despite the order showing as complete and payment being taken in full, I have been unable to use the product I was charged for, and my two prior support enquiries have gone unanswered.

This has caused real disruption. I purchased the service to meet a project deadline, and the missing access has forced delays that reflect poorly on my own commitments. As a paying customer I expected the basic deliverable to arrive as advertised.

To resolve this matter, I am requesting one of the following:

Immediate activation and delivery of the purchased API access keys
Or a full refund of the annual fee paid
Written confirmation of which resolution you will provide within 14 business days

I would prefer to resolve this directly and amicably. Please treat this as a formal complaint and respond in writing at the contact details above.

Sincerely,

Sarah Jenkins

Requires a formal response within 14 business days.

Jane Smith

Free

Letters & Emails

Complaint Letter Template

Formal complaint layout documenting transactional order issues, damaged goods, or service disruptions.

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Rivera Strategy Group

264 Mission Street, Suite 593, Chicago, IL 60601 · hello@riverastrategygroup.com · +1 (555) 857-6399

Rivera Strategy Group

123 Maple Street | hello@riverastrategygroup.com | +1 (555) 857-6399

2026-07-01

Mr. Andrew Coleman, Meridian Partners LLC

55 Fruit St, Boston, MA 02114

Subject: Application for Senior Software Engineer Position (Ref: REF-2026-0451)

Dear Mr. Andrew Coleman,

I am writing to you on behalf of Rivera Strategy Group regarding our upcoming quarterly strategic alignment. As our two organizations continue to collaborate, we believe a clear, documented understanding of priorities for the next cycle will serve both parties well.

The purpose of this correspondence is threefold: to coordinate vendor delivery schedules, to review the deliverables completed to date, and to outline the parameters for the next phase of joint work. We consider each of these items material to keeping the partnership on track.

On the technical side, our roadmap for the period includes scaling backend capacity, introducing a caching layer to improve response times, and running structured user-acceptance testing on the new dashboards. We would value your team's input on sequencing these items so that neither side is blocked.

We look forward to your feedback on the adjustments described above and are happy to arrange a call at your earliest convenience to discuss any point in detail.

Yours faithfully,

Sarah Jenkins

Senior Principal Consultant, Daniel Foster

Official document of the sender corporation.

Rivera Strategy Group

Free

Letters & Emails

Business Letter Template

Classic corporate formal letter structure for official communications, inquiries, and announcements.

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Acme Global Inc.

230 Mission Street, Suite 349, Seattle, WA 98101 · hello@acmeglobalinc.com

Acme Global Inc.

1200 Corporate Drive, Suite 300, Austin, TX 78701

2026-07-01

Michael Chen

88 Riverside Avenue, Apt 4C, Austin, TX 78702

RE: Offer of Employment - Senior Marketing Manager

Dear Michael Chen,

On behalf of everyone at Acme Global Inc., it is my delight to offer you the position of Senior Marketing Manager within our Engineering & Technology team. Your interviews left a strong impression, and we are confident you will thrive here.

This is a Full-Time position beginning August 17, 2026. You will report directly to Jennifer Walsh, Director of Marketing, and your standard schedule will be 40 hours per week, flexible core hours. Your starting compensation is $95,000 per year, reviewed annually in line with performance.

In addition to salary, you will be enrolled in our full benefits program, which includes:

Comprehensive medical, dental, and vision coverage from day one
401(k) retirement plan with company matching
20 days of paid time off plus recognised public holidays
An annual learning and professional development stipend

This offer is contingent on satisfactory reference and background checks and remains open until 2026-07-07. To accept, please sign and return a copy of this letter by that date. We are excited about the prospect of you joining us.

Warm regards,

Marcus Vance, HR Director

Sophia Reyes, HR Director

Subject to background reference verifications. Acme is an equal opportunity employer.

Acme Global Inc.

Free

Letters & Emails

Offer Letter Template

Formal hiring offer letter template mapping compensation, reporting lines, benefit details, and deadlines.

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Dr. Robert Vance

236 Mission Street, Suite 397, Seattle, WA 98101 · hello@drrobertvance.com · +1 (555) 207-1849

Alex R. Morgan, Principal Lead Engineer

Dr. Robert Vance | hello@drrobertvance.com | +1 (555) 207-1849

2026-07-01

Dr. Elaine Foster

Massachusetts General Hospital, 55 Fruit St, Boston, MA 02114

RE: Recommendation for Dr. Watson

Dear Dr. Elaine Foster,

It is a genuine pleasure to recommend Dr. Watson to your program. I have worked closely with them as their Direct professional supervisor for 3 years, which has given me a clear and firsthand view of both their professional capabilities and their character.

Technically, Dr. Watson is exceptional. They handle advanced clinical diagnostic assessments, manage complex data with precision, and have co-authored four peer-reviewed studies. What sets them apart is not just the output but the rigour behind it; every deliverable I reviewed was thorough, well reasoned, and delivered ahead of schedule.

Beyond the technical, they bring a work ethic that lifts everyone around them. They consistently go beyond what is asked, volunteer for the hardest problems, and remain calm and ethical under pressure. Colleagues trust them, and that trust is well earned.

Without reservation, I recommend Dr. Watson with the highest possible rating. They will be an outstanding addition to your organization, and I am confident they will exceed your expectations.

Sincerely,

Sarah Jenkins

Contact: contact@recommender.com | +1 (555) 449-3322

Shared in confidence for candidate evaluation only.

Dr. Robert Vance

Free

Letters & Emails

Recommendation Letter Template

Detailed professional reference letter for former employees or academic candidates.

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David Miller

236 Pine Street, Suite 201, Austin, TX 78701hello@davidmiller.com+1 (555) 633-8931

Alex R. Morgan (Employee ID: EMP-4482-A)

Principal Lead Engineer, Engineering & Technology Department

hello@davidmiller.com | +1 (555) 633-8931

2026-07-01

John Watson, Director of Engineering

RE: Notice of Resignation

Dear John Watson, Director of Engineering,

Please accept this letter as formal notice of my resignation from the position of Principal Lead Engineer at David Miller. In line with my 30 days written notice required by either party notice obligation, my final working day will be 2026-07-31.

This was not an easy decision. After careful reflection I have accepted an opportunity that moves me toward building developer tooling, a direction I have wanted to pursue for some time. The choice is entirely about that next chapter and not a reflection of my experience here, which has been overwhelmingly positive.

I am sincerely grateful for the mentorship, trust, and growth this team has given me. The projects I contributed to and the colleagues I worked alongside have shaped how I approach my craft, and I will carry those lessons forward.

To make the handover as smooth as possible, I will document my active work, prepare complete technical handovers, and help onboard my replacement before I depart. Please let me know how else I can support the transition over the coming weeks.

I wish you and the entire team continued success, and I hope our paths cross again.

Best regards,

Sarah Jenkins

Copy filed with Human Resources Department.

David Miller

Free

Letters & Emails

Resignation Letter Template

Formal letter template to notify employer of resignation and specify transition timelines.

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Sarah Jenkins

266 Peachtree Road, Suite 317, San Francisco, CA 94105

hello@sarahjenkins.com

+1 (555) 749-9743

APPLICATION COVER LETTER

Alex R. Morgan, Principal Lead Engineer

123 Maple Street, Seattle, WA 98101

hello@sarahjenkins.com | +1 (555) 749-9743 | LinkedIn: alex-morgan-lead | Portfolio: alexmorgan.dev

2026-07-01

Ms. Laura Bennett, Hiring Manager

Sarah Jenkins

500 Howard Street, San Francisco, CA 94105

RE: Application for Senior Software Engineer (Ref: REF-992288)

Dear Ms. Laura Bennett,

I am writing to formally apply for the Senior Software Engineer role at Sarah Jenkins, which I discovered through your careers portal. The moment I read the posting I recognised a rare match between what your team is building and the work I have spent the last several years perfecting, and I would welcome the opportunity to contribute from day one.

Across more than six years as a Principal Lead Engineer, I have shipped scalable cloud architectures, led React front-end rebuilds, and tuned high-volume SQL workloads. In my current role I own features end to end, from technical design through production monitoring, and I mentor two junior engineers while doing so.

The achievement I am most proud of is a database sharding strategy that cut infrastructure spend by 30 percent while tripling query throughput. I care about outcomes like that because they compound: faster systems free the whole team to ship more, and disciplined engineering keeps that speed sustainable as the product grows.

What draws me specifically to Sarah Jenkins is your public commitment to open-source and developer enablement. I would bring the same blend of hands-on delivery and quiet technical leadership that has served my teams well, and I am confident it maps closely to what this role demands.

Thank you for considering my application. My resume and portfolio are enclosed, and I would be glad to walk you through any of it in an interview at your convenience.

Sincerely,

Sarah Jenkins

Enclosures: Resume & Professional Portfolio References.

Sarah Jenkins

Free

Letters & Emails

Cover Letter Template

Standard job application cover letter detailing experience, motivation, achievements, and target role.

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What is a formal letter?

A formal letter or professional email communicates a specific request or notice — a resignation, a leave application, a complaint, a reference request or a payment reminder — in a clear, courteous, on-the-record way. Employees, HR teams and businesses use them daily, and the right structure and tone decide how the message lands. A good letter states its purpose up front, gives the necessary detail, and closes with a clear next step. These free letter and email templates cover the situations you actually face and download as PDF or Word.

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Letters & Emails — frequently asked questions

What is the correct business letter format?

Should I send a letter as PDF or Word?

How formal should the tone be?

Do I need to sign a letter I send by email?

Free Letter & Email Templates

Letters & Emails Catalog & Available Layouts

Thank You Letter Template

Complaint Letter Template

Business Letter Template

Offer Letter Template

Recommendation Letter Template

Resignation Letter Template

Cover Letter Template

Related Searches

What is a formal letter?

Professional, Export-Ready Formatting

Letters & Emailsguides & how-tos

Share these Letters & Emails templates

Letters & Emails — frequently asked questions

What is the correct business letter format?

Should I send a letter as PDF or Word?

How formal should the tone be?

Do I need to sign a letter I send by email?