Escalation procedure - External .nl domain

Question
How to start an escalation process in case the current registrar of a .nl domain does not provide a transfer code?
Answer
Openprovider can start an escalation procedure when the owner of a .nl domain wants to retrieve their transfer code (also referred to as authorization code / token) , but has trouble to receive this from the current registrar. A reason can be that the company is bankrupt, does not respond, or in case of conflict.
SIDN provides a procedure to start an escalation process, in which the current registrar gets 5 working-days to resolve the issue himself or, in case the issue is not resolved in 5 days, SIDN will verify the owner and provide the transfer code.
The following documents are required (by email to support) to start this process:
If the registrant is a natural person:
a copy of the identity document of the registrant
proof of ownership (available here, more information available in our .nl article (Transfer > Proof of ownership))
proof that the registrant first requested the code at the current registrar (for example an e-mail)
proof that the registrant wants to transfer the domain name to Openprovider (for example, an e-mail)
If the registrant is a legal person (company):
a business registration document from the Chamber of Commerce (not older than six months) from the registrant
a copy of the identity document of the person authorised according to the business registration document
proof that the registrant first requested the code at the current registrar (for example an e-mail)
a proof that this registrant wants to move the domain name to Openprovider (for example an e-mail)
Domain in quarantine
In case the domain itself is not active, but already in quarantine,  a different process can be used.
Please follow the steps in this article if the domain is currently in quarantine.