If the mobile phone is still under the warranty period of 1 year from the date of activation, you can go to the apple store direct store or authorized after-sales store to participate in the warranty without providing an invoice. Some will ask you to show your invoice, but you say no. If they find that your mobile phone is still under warranty, they won't force you to provide the invoice.

1. After using the equipment for a period of time, people often forget the initial purchase time, thus missing the opportunity of official warranty. We can check the relevant information through official website.

2. Enter the website of Apple Technical Support in the browser, enter the serial number of the hardware equipment, and inquire about the warranty status and the expiration time of the warranty service.

3. In addition, you can also use third-party software, such as PP assistant, to query the related information of hardware devices after connecting computers and devices.

1. Invoice refers to the text issued by the seller to the buyer in economic activities, including the name, quality and agreed price of the products or services provided to the buyer. In addition to the advance payment, the invoice must also include the money paid by the buyer to the seller according to the agreed conditions, and must include the date and quantity, which is an important proof of accounting.

2. According to China's accounting system, a valid invoice for purchasing products or services is called a tax invoice. The charging vouchers of government departments have different names in different periods and different charging items, but most of them are collectively referred to as administrative fee receipts.

3. For internal audit and verification, each invoice must have a unique journal number to prevent the invoice from being copied or skipped.