SEIS advance assurance
SEIS advance assurance is a non-binding HMRC letter confirming a UK company appears to qualify for the Seed Enterprise Investment Scheme, used by founders to de-risk angel-investor due diligence.
SEIS advance assurance is a letter from HMRC stating that, based on the information the company provided, the proposed SEIS share issue appears to qualify. Most UK SEIS-eligible angels filter incoming deals by "advance assurance obtained" so the company can demonstrate the tax relief is likely to hold post-investment.
Application is via the SEIS/EIS Compliance team at HMRC, typically with: business plan, financial projections, articles of association, accounts (if any), and details of the company's qualifying trade. Decision in 4-8 weeks.
Cited on the SEIS Pitch Deck and EIS Pitch Deck templates and referenced in any SEIS-friendly data room as part of the legal pack.
See also: Virtual Data Room.