> For the complete documentation index, see [llms.txt](https://help.sipgate.de/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.sipgate.de/cloud-telefonanlage/en/account-management/vertrage-rechnungen-und-preise/wie-aendere-ich-meine-vertragsdaten.md). # How do I change my contract details? #### **Change of contract partner** You have the option of transferring an existing sipgate account to new contracting parties. The existing terms remain in place. The new contracting parties can then terminate or amend this contract individually in accordance with our [Terms and Conditions](https://www.sipgate.de/agb-sipgate) terminate or amend it individually. The phone numbers will also remain with the account and will be transferred in accordance with **declaration of transfer** taken over. Partial or complete porting by the transferring contracting parties is not possible. Phone numbers cannot be taken over on their own either; they are firmly linked to the associated contract. Phone numbers from area codes that are not covered by the locations of the new contracting parties will be detached from the customer account on the date the access is transferred and, after the deadline imposed by the Federal Network Agency, released again. For a **Change of contract partner** please fill out the [form provided here](https://static.sipgate.com/static/downloads/docs/Vertragsdatenaenderung.pdf) and send it together with the requested documents/proof by email to or by fax to 0211-58005400. Alternatively, you can also send the form to us by post at sipgate GmbH, Customer Service, Gladbacher Str. 74, 40219 Düsseldorf. As soon as we have received and processed your request, we will inform you by email. We recommend that you log in to your sipgate account and change your user data yourself. #### **Verify location address** To verify the address of the new locations, the new contracting party should attach current **documents** that provide proof of authorization (e.g. **business registration, commercial register extract, electricity, water or gas bill**). Rental agreements are only accepted in the case of a **change of location by private customers** accepted. #### **Change users** The users of the transferring account holder are not deleted automatically by us. The transferring account holder can delete all users before the account is transferred. Only one admin access needs to remain. The new account holders can then create their users. At this step, we also recommend that **all passwords be changed**. Alternatively, the new account holders can delete the users that are no longer needed and create new ones, if that is desired at all. #### **Change billing address** In the **account management** on the left **Account** and then **Management** select. Then go to the menu item **Invoices** and change the billing address there as desired. You can then, in the section **Invoices,** have each invoice created so far from the last 12 months reissued with the new billing address. To do this, click the circular icon behind the respective invoice. You will then receive a cancellation invoice as well as a newly issued invoice with the updated billing details, which you can download. ![Screenshot from 2025-06-30 10-03-38.png](/files/5921cfd54b6477bcad4fef481ab4d33ceabb043b) #### **Change locations** In the overview, go to the menu item [**Locations**](https://app.sipgate.com/team/settings/location). There you can use the button **Add** to create a new location or, via the three dots next to your current location, commission a move to a new location. You can also edit an existing directory listing here. It is recommended to first delete an existing directory listing completely and, due to the data reconciliation with the relevant parties, only create the new entry after one week. --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. 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