Board Thread:Love Live! School Idol Festival Lounge/@comment-26580939-20150706234900/@comment-11148831-20150709095012

Irlmakinishikino wrote: ...原則といたしまして、 運営ではデータ引き継ぎの対応をおこなっておりませんが 確認項目に対して、 お客様から正確な情報をご申告いただいた場合は ご本人様確認後、 データ引き継ぎ対応を実施させていただく場合がございます. This one, they're telling you that they're gathering information from the customer (in this case, you) to confirm that they are the owner of the account.

Irlmakinishikino wrote: ...◆過去に使用したことのあるシリアルコードをご記載ください

【回答】： This one, they're asking for serial codes you may have used for promo cards.

Also, they may be asking for the information again and again because the answer you gave may not be what they're trying to look for.