There are several strategies marketing agencies can employ to ensure influencers comply with brand guidelines during a promotional campaign. Here are a few strategies:

1. Detailed Briefing: Prior to the campaign, agencies should provide influencer with a comprehensive briefing that details the brand’s expectations and guidelines. This should cover content style, language, key messages, tone, visual elements, and any do’s and don’ts.

2. Agreements and Contracts: Agencies should establish a contract with the influencer that clearly outlines all obligations, including adherence to brand guidelines. This reduces the risk of misunderstandings and provides a legal fallback should issues arise.

3. Regular Check-ins: Keeping a consistent line of communication with influencers helps ensure that they understand and remain aligned with the brand guidelines. Regular feedback and revisions can prevent deviation.

4. Use of Influencer Marketing Tools: Platforms like Flinque, offer features to help manage and track influencer content. By using these platforms, agencies can review the content before it is posted and check that it aligns with brand guidelines.

5. Educate Influencers: Training sessions or workshops can be useful for educating influencers about the brand and its values, leading to more authentic and guideline-compliant content.

6. Performance Monitoring: Monitor the performance of influencer content to ensure it aligns with the brand’s values and guidelines. Platforms can provide analytics that show this, allowing for adjustments if necessary.

Remember, the choice of strategy varies depending on the brand’s specific requirements and the influencer’s experience and size of following. It’s key to establish a strong foundation of communication and understanding before commencing the campaign.