Payments from ADMOB Inc. and laws of the Russian Federation?

Question

Android

Actually, I thought to calmly receive my miserable $ 120 for May, and then suddenly a letter came from the bank with the following content:

Dear Airat Raisovich!
On July 15, 2013, the Bank received payments in the amount of USD 119.61. Beneficiary AYRAT SABITOV, account _____________. Sender ADMOB INC.
In order for the bank to perform the functions of a currency control agent, please send an explanation on the purpose of the payment, and also ask you to send a copy of the agreement or other documents that are the basis for this currency transaction.
The deadline for submitting documents is August 15.

How to proceed in this case? Is it obligatory to register an individual entrepreneur / LLC or can we say that this is a fee for the right to use copyright? Should I specify "User Agreement" as a contract?
In general, I will be grateful for the advice to all those who are already getting something from behind the hillock :)

Answer 1

Can write like this: You advertised your offer, but because the advertisement was not carried out with due success, you requested a full refund. Here is ADMOB INC and returned the payment.
Fortunately, the site has a phrase: promote your apps with ads. Here is what you refer to.

Answer 2

Yes, you can refer to the user agreement.
Useful information: in Sberbank, with their eternal mess, currency control does not work for individuals at all.