One of the most common and serious issues with mail and courier service is the breach of confidentiality or security of your confidential or sensitive items, such as personal or business information, contracts, or financial records. This can have legal, financial, or reputational consequences for your business, and may expose you to identity theft, fraud, or litigation. To protect your confidential or sensitive items, you should choose a reliable and reputable service provider that offers secure and trackable delivery options, and has clear policies and procedures for handling confidential or sensitive items. Additionally, label your items clearly and accurately, and include the sender's and receiver's name, address, phone number, and email. You may also use a code or a reference number instead of the actual content or purpose of the item. Furthermore, seal your items securely, and use tamper-evident or tamper-resistant packaging, such as envelopes, boxes, or bags that have special features or markings that indicate if the item has been opened or damaged. Lastly, keep a copy or a backup of your items, and shred or dispose of any unwanted or unnecessary documents or records.