Account for the relationship as it is now
Use a tone that fits the present relationship, not the closeness, authority, or access that existed in the past. For a message about how to reconnect with a music class friend, use this factual base: introduce yourself with one shared place, activity, person, or time period they can recognize.
Ask without assigning an obligation
Explain what you hope for while making decline, delay, or a different format genuinely acceptable. Offer a low-pressure way to confirm the connection and share a brief reason for reaching out. Make the immediate next step clear enough that the recipient can answer without reconstructing the entire history.
Keep the ending honest
Do not assume old closeness, demand memories, or ask for personal details before they verify who you are. Respect privacy, identity uncertainty, and any refusal, and avoid contacting a minor without a guardian-appropriate route. Avoid future promises, guilt, flattery, or nostalgia that imply the recipient owes you access.