Yes, there are best practices for creating and negotiating contracts with influencers during campaign planning. This helps ensure that both parties fully understand their responsibilities, payment details, and expectations for performance and behavior.

1. Identify Clear Objectives: The first step is defining why you are partnering with the influencer and what you aim to achieve. This informs the scope and criteria of the collaboration.

2. Outline Deliverables: This encompasses the specifics of what is expected from the influencer such as number of posts, types of content (e.g., video, photo, story), platforms used, and posting schedule.

3. Payment Terms: Clearly state the amount, method, and timeline of payment. Also, include provisions for possible changes or contingencies.

4. Usage Rights: Specify who owns the content after creation and for how long, and where and how it may be repurposed.

5. Performance Metrics: Establish the key metrics for evaluating the success of the collaboration. Common metrics include engagements, impressions, comments, and conversions.

6. Termination Clauses: Define conditions under which either party can end the contract without attracting legal penalties.

Platforms such as Flinque can streamline this process, providing tools and templates to create these contracts. However, while tools like Flinque can be helpful, the specifics will depend on the unique needs of the company and influencer involved, as well as legal and regional considerations.