How to make a payment on the site so that everything is in accordance with the law?

Question

Electronic accounting

Hello. Help, please understand. There are retail outlets that have online cash registers. An online store is currently under development. To pay on the site, you need a payment module. In order not to violate the laws, which payment module is needed. If, for example, acquiring from Sberbank or another company, then use the module to pay them, or can any one? Please help me to understand this issue as it is not clear.

Answer 1

Online checkout is required. and acquiring is already any