A medallion signature guarantee must be completed in person because it confirms your identity, signature and legal authority to transfer securities. The Letter of Instruction must be signed in the presence of the individual guaranteeing your signature.A letter of instruction is a document that guides a designated individual or entity on how to carry out specific actions or wishes after the author's demise. 1. Applicant's Name and Address 2. Bank of America provides notary services free of charge in all financial centers. Schedule an appointment and learn what is needed for a notarization. How to fill out the Bank Letter of Guarantee Template? Each applicant must complete and sign a visa application, filling out every section. San Diego, CA 92186-5304. Protect yourself from wire fraud.