How long does it take Alipay to apply for an electronic receipt?

It will be received within 24 hours, not more than a week at the longest.

Alipay electronic receipt is an online transaction voucher, which is used to prove that the user has paid the money and can be used for refund and rights protection application. Users can select the order to apply for electronic receipt on the Alipay billing page, click the "Apply for Electronic Receipt" button, fill in the relevant information as prompted, and then submit the application. After the application is submitted, the system will review it within 24 hours and generate an electronic receipt.