What is the certificate of employment in Japan called in Japanese? -

Anyone have any idea what it s called in Japan (in romanji please)? I m having trouble finding out and require it for visa purposes. I ve heard that it s called a quot;zaishokushomeishoquot;, but I don t think that s it. Please help urgently.

雇用の証明書. Sorry, forgot the romaji part koyou shomeishou.