Letter of Support Tips & Template


Collecting Letters of Support (LOS) is consistently listed in our client’s feedback as one of the most challenging aspects of proposal prep. 

Best practices for collecting LOSs also happen to be one of our client’s top asks involving our subject matter expertise. This download package contains agency-specific guidance for SBIR/STTR from NIH, NSF, and DoED, our field-tested example, and a template.



A Letter of Support (LOS) is a document used to validate the credibility of your research through a third-party testimonial. This testimony should support your claims of success and the promise to deliver results. The letter implies that other organizations or funders think your proposal has merit.

The number of letters and specific instructions for format and content will be dictated by the specific funding line you are pursuing. However, we have learned some general best practices and tips for any LOS, which we will share with you in this download.

Where should you solicit letters of support? There are three categories of ideal candidates for LOS – stakeholders, potential customers, or potential investors. Ideally, your LOS can be drafted by one of these entities. While you will have to go out and find the proper candidates yourself, we can provide tips, tricks, and best practices to make the process of collecting LOS more straightforward and efficient. Enjoy!

Included in this download

  • TIPS: Tips for crafting and collecting Letters of Support (LOS) from key individuals that will help give your proposal that edge over your competition. Agency-specific guidance for SBIR/STTR from NIH, NSF, and DoED. Insights into what agencies are looking for, along with their expectations on what to include and who you should include. Our field-tested example is that you can use as inspiration to request letters from select key individuals.
  • LOS Template: Letter of Support Template that you can use in your next SBIR/STTR application.

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