What guarantee do I have regarding the quality of the service?

We work exclusively with qualified native translators.
We have 10 years’ experience as a language service provider.
If the client is dissatisfied with a translation for issues that can be objectively addressed, we will provide a revision as quickly as possible at our expense. In the event of a delay in delivery, we are committed to provide a discount on the translation of up to 100%.
Payment is made subsequent to delivery. This means that you pay for the translation only after seeing it.

 How can I send you the document?  When do I pay?