You can do both procedures through the web. If you apply to receive the Billing Statement, a fee of 253 yen (230 yen excluding tax) will be charged.
Customers with au contract, log in with your au ID from My au (web).
Customers with UQ mobile (5G compatible plan) contract, log in with your au ID from My UQ mobile.
Select "My au TOP" and tap on "Billing/Payment Procedures List" [請求・支払関連のお手続き一覧].
Tap on "Billing" [ご請求].
Tap on "Apply/Cancel Billing Statement" [紙請求書の申込・廃止] in the "Billing" [請求書] item.
Check "I agree to the above important matters" [上記重要事項に同意します] and tap on "Agree and proceed" [同意して手続きに進む].
Select the billing code you want to process, check the "New Setting" [新しい設定], and tap on "Next" [次へ].
Tap on "Apply with this content" [この内容で申し込む].
The procedure is now completed.
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