DomeinWinkel / DomainWinkel invoices you for a domain renewal 30 days prior to the date of renewal. Even if you decided NOT to renew the domain, you are required to pay the invoice for the domain renewal. From support: "Since we use a month's notice for all our services, this invoice must still be paid." So long as you have an unpaid invoice, they refuse to transfer any domains out of your account. Requiring payment of an invoice for renewal when you are not renewing seems like sharp practice to me. They are pocketing money for a service that you have not requested and do not want. This is the registrar to which CatchTiger domains go when caught.