MT 767 Explained: Guarantee Amendment

MT 767 amends a guarantee or standby LC that was already issued via MT 760 — extending its validity, changing the amount, or revising its wording. Guarantees tied to long-running contracts (a multi-year performance bond, for example) are commonly extended this way rather than reissued from scratch.

Key fields

• 20 — Sender's Reference: Reference for this amendment.
• 21 — Related Reference: The original guarantee being amended.
• 23 — Further Identification: Same role as in MT 760 — confirms this is an amendment message.
• 26E — Number of Amendment: Which amendment this is, in sequence.
• 32B — New Amount: Present only if the guaranteed amount is changing.
• 23B — New Expiry: Present only if the validity period is changing.
• 77C — Narrative of Changes: Plain-text description of exactly what's being amended.

Unlike a documentary credit amendment, a guarantee amendment often needs the beneficiary's explicit consent too, since it's their right to claim that's being changed — many guarantees are drafted requiring written beneficiary agreement before any amendment takes effect.