Beware of registered user requirements. Counterfeiting can be a problem. Governing Law - the goal is to achieve certainty in the transaction. Choice of U.S. law, choice of foreign law, and the effect on U.N. Convention on Contracts for the International Sale of Goods. Dispute Resolution Litigation is best if quick action is necessary, such as injunction, and is also best with multiple parties.
Litigation can also be effective when used in combination with forum selection clause.
Duplicate proceedings must be avoided at all costs. The right of appeal can be important. Cost may be a factor, as well as fear of local prejudice. Make sure countries involved have ratified the New York Convention on the Recognition and Enforcement of Foreign Arbitral Decision. Cost of arbitration may be lower than litigation, but not necessarily.