These are the top signs of a reliable assignment writing service:

1. Professional and expert writers: reliable platforms have a team of writers who are qualified, experienced and specialised in their fields.

2. Plagiarism-free and original content: a reliable service guarantees plagiarism-free and 100% original content. Also, to ensure originality, they provide plagiarism reports.

3. Positive reviews: on sites like Trustpilot or Sitejabber, previous clients provide positive and honest reviews about them.

4. Clear policies and security: they inform you honestly about the pricing. Also, their policies are not hidden. They ensure money-back and revision policies.

5. On-time delivery: They ensure on-time delivery.