Please enclose a self-addressed envelope.

请附上写明姓名地址的回邮信封。

《新英汉大辞典》

Please remember to enclose a stamped self-addressed envelope when writing.

请记住写信的时候附上一个贴好邮票、写好自己姓名地址的信封。

youdao

In all cases, please enclose a self-addressed envelope and two international reply coupons.

在所有情况下，请附写明姓名地址的信封，两张往返国际邮票。

youdao

He includes a self-addressed stamped envelope and has been surprised by the response.

WSJ: Smitten by Smiths: Bob Ziegler

Only after Mr. Smith received a third insistent letter from Mr. Ziegler did he drop his business card into the self-addressed stamped envelope.

WSJ: Smitten by Smiths: Bob Ziegler

Giveaway Results: To request the name of the winner, send a self-addressed stamped envelope to Engadget Back to School Part 1 Winner's List, Engadget.com, Attn: J.

ENGADGET: blogger-avatar