A letter of credit is a contractual commitment by an importer's bank to pay an exporter once goods are shipped and documentation is provided, protecting both parties. Letters of credit are recommended for higher-risk international sales involving new relationships or extended payment terms. Exporters should consult their bank on costs and disputes before an importer applies for a letter of credit. The importer applies to their bank to open a letter of credit based on the sales agreement, which then transmits it to the exporter's bank for review and approval. The exporter ships goods and submits documents to their bank, which checks for compliance before submitting to the importer's bank for payment.