This criterion evaluates how well you fulfill the requirements of the task:

• Address all bullet points in the question
• Clearly state your purpose for writing
• Use appropriate tone (formal/semi-formal/informal)
• Write at least 150 words

This assesses how logically organized your letter is:

• Use clear paragraphs (one per main idea)
• Use linking words appropriately
• Ensure smooth flow between ideas

This evaluates your vocabulary use:

• Use a wide range of words
• Choose words with precise meaning
• Spell words correctly
• Use appropriate formality

This assesses your grammar skills:

• Use variety of sentence structures
• Maintain grammatical accuracy
• Use correct punctuation

Dear Manager,

I am writing about the camera I bought from your store. The camera has a problem with the screen. When I take photos, the screen goes black. This is not good because I need the camera for my work.

I would like you to give me a new camera or my money back. I have the receipt. Please contact me soon to fix this problem.

Yours sincerely,
John Smith

Band 6 Features:

• Addresses all bullet points but with basic detail
• Simple paragraph structure with minimal linking
• Some vocabulary repetition (“camera”, “problem”)
• Mostly simple sentences with few errors

Dear Sir/Madam,

I am writing to formally complain about the Canon EOS 250D digital camera I purchased from your Oxford Street branch on 15th August. Regrettably, the device has developed a significant technical fault that renders it unusable for professional purposes.

The primary issue manifests when attempting to capture images, as the LCD screen inexplicably turns black immediately after pressing the shutter button, despite the battery being fully charged. This malfunction has caused substantial inconvenience, as I rely on this equipment for client assignments.

I would respectfully request either a replacement unit of equivalent specification or a full refund of the purchase price. For your reference, I have enclosed a copy of the original receipt. I would appreciate your confirmation of receipt of this complaint and resolution proposal by 30th August.

Yours sincerely,
John Smith

Band 8 Features:

• Fully addresses all requirements with detailed explanations
• Excellent paragraphing with sophisticated linking
• Wide range of precise vocabulary (“technical fault”, “manifests”)
• Varied sentence structures with high accuracy