Hey @Beeeeeeee unfortunately you cannot remove your bank details from your account yourself. You have two options: call customer service or wait until an o2 moderator answers.

Okay thanks for that. Do I wait for the moderators to message me or is there another option to text them privately cause I didn’t see the option in their profile

Postpaid contract: The direct debit (SEPA Mandat) must be revoked by mail (letter).

Prepaid contract: Direct debit should be revoked by mail. Can also revoked by the o2 prepaid customer care, i.e. using the o2 prepaid customer chat (o2 Prepaid Kundenchat): www.o2.de/chat

o2 employees here in the forum don`t remove / delete any SEPA mandates.

Could you please share the email address 

Oh or you mean physically mailed? Well thanks for the information too.

There is no email address for your request. You have to contact o2 by post.

Telefónica Germany GmbH & Co. OHG

Kundenbetreuung 

90345 Nürnberg

Okay thank you!

Hello @Beeeeeeee ,

Welcome to the Commuinty.
I see you already got the right help and answer here. 
Correct, if you want to delete or change your bank details with us, please submit it in writing. 
You already got the address here. 

Feel free to contact us again if you have any questions. 

Best regards, 
Maria