Conyac で依頼された翻訳結果を公開

I would like to have a suggestion for you.
What would you think if I pay the fee after you purchase a product at the boutique in England?
It would be confortable for me if you could send the duplicated invoice by mail to check the amount.
The method of payment will be by the Amazon's gift card orthe paypal.
I'm sorry about sending the mails several times.
Thank you very much for your consideration.