Payment Request is mediator between payment gateway and erpnext. From Sales Order or Sales Invoice you can initiate Payment Request. - Create Payment Request via Sales Order Payment Request - Create payment Request via Sales Invoice Payment Request --- Select appropriate Payment Gateway Account on Payment Request. Account head specified on payment gateway will considered to create journal entry. Note: Invoice/Order Currency and Payment Gateway Account corruncy should be same. Payment Request --- ##### Notify Customer You can notify customer from Payment Request with print format. If customer contact email is mentioned, it will automatically fetch email. If not so you can set email id on Payment Request. Payment Request ##### Request Mail Payment Request