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TigerS Notice:
A push of a domain name is currently only supported by the following registries:
.AT - A domain name can be pushed to the registry (Target: "REGISTRY"). The registrant becomes the new invoice recipient ("billwithdraw").
.DE - A domain name can be pushed to the registry (Target: "REGISTRY"). The registrant becomes the new invoice recipient ("DENIC transit"). In this case the domain is not resolving any more by default. In order to keep it connected please use "REGISTRY/ACTIVE" as target.
.DK - The registrant can be enregistered as invoice recipient (Target: "REGISTRANT").
.UK - A domain name can be pushed to another registrar (Target: "<NEW-REGISTRAR-TAG>") or to the registry (Target: "REGISTRY") ("DETAGGED").
网站上是这么说的。