Quality No.1. Reliability
Along with the total number of payments, the number of scam ones is also growing. On some GEO sites, for example, in India and Africa, you need to stay attentive and focused to catch every detail. It is not surprising that online bookmaker and casinos pay attention to risks first of all.
In order for the payment to be considered reliable, information about their failures and, moreover, that they are scammers should not go around the market. The minimum plan has been completed. What's next? Adhere to the policy of openness (within reasonable limits, of course). The more the payment system is ready to tell about itself, the more willing they will be to cooperate with it. Another indirect sign that the payment system can be considered more reliable is the labor and time that they have invested in their structure — the presence of a legal entity, a large staff, physical offices, financial licenses, PCI DSS. It is also important to be ready to meet halfway — to work with a deposit, to call up, to meet in person, to agree to reasonable limits.
Of course, none of this gives a 100% guarantee that a potential partner can be trusted, but it makes it much easier to determine the riskiness of cooperation.