Whether to pay monthly or in cash depends on your shipment. If there are many, monthly settlement is more appropriate.
The specific matters related to the second question can be negotiated with the courier company. After all, each company has different requirements.
Extended data:
Service companies derived from door-to-door logistics activities with postal functions are called courier companies, which use railway, highway, aviation and other modes of transportation to deliver customers' goods quickly.
Express companies can operate on different scales, from serving specific towns to serving regional, transnational and even global services. The major express delivery companies in China include SF Express, Yuejin Express, Best Express, ZJS Express, ZTO Express, Shentong Express, Tong Yuan Express, Dayun Express and Guo Tong Express.
20 17 12 1 The Standard English Translation and Writing in Public Service Field was officially implemented, which stipulated that the standard English name of the courier company was courier service company.
References:
Baidu Encyclopedia: Express Company