Wire transfers involve directly transferring funds from a buyer's bank account to a seller's account. They are the simplest form of international payment but have low reliability without trust between parties. Bank guarantees involve a bank undertaking to pay the seller even if the buyer fails, upon confirmation of fulfilled obligations. Letters of credit involve a bank promising to pay the seller upon presentation of compliant documents, ensuring payment for the seller and goods receipt for the buyer. Pricing ranges from 0.25% for wire transfers and bank guarantees to up to 2% for letters of credit, which have higher fees for issuance, confirmation, document checking and reimbursement processing. The document requests any questions or comments about international payment methods.