How to Secure an Affiliation Letter
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An affiliation letter removes the biggest unknown: "Will this person actually carry out this research?" Even when technically optional, applicants with one are significantly more likely to win.
Expect to send 15–30 emails and hear back from 2–3 professors. Summer timing (Jun–Aug) makes faculty unreachable. Start outreach at least 6 months before the deadline.
Keep it under 200 words. Lead with their specific work that connects to yours. Attach a 1-page research summary. Don't use generic templates — professors can tell.
Must be on official university letterhead, physically signed (some commissions reject digital signatures), and in English. Allow extra weeks for departmental processing.
Wait 7–10 days, then send one follow-up. After two emails with no response, move on. If a professor says "maybe," send a brief, specific follow-up with a clear ask.
The letter should confirm: willingness to supervise, available resources (lab space, data access), and the relevance of your proposed work to their research.