Under normal circumstances, Minsheng Bank credit card cash installment application requires proof of consumption. Proof of consumption refers to what banks require customers to provide to prove their consumption for no more than 3 months, as well as the amount of money generated by the consumption. Different banks may have different requirements for proof of consumption, but they generally include the following methods:

1. Invoice: When shopping, you can ask the merchant to provide an invoice as proof of consumption. When applying for Minsheng Bank credit card cash installment, some installment methods require an invoice.

2. Electronic invoices: Many merchants support electronic invoices, which can be saved as proof of consumption after shopping. Some Minsheng Bank credit card installment application methods support electronic invoices.

3. Bank statements: Some installment application methods require bank statements for the past three months. Customers can download bank statements at the bank counter or online banking as proof of consumption.

4. Transfer voucher: If the payment or transfer is made to a merchant or service provider, you can also consider providing relevant transfer vouchers, such as proof of receipt provided by the payee.

Therefore, when applying for Minsheng Bank credit card cash installment, you need to provide corresponding proof of consumption according to the requirements of different products for proof of consumption. If you are not sure what proof of consumption you need to provide, it is recommended to contact Minsheng Bank customer service for consultation.