remember to write
A clichéd farewell urging someone to remain in contact while they are gone. Sometimes used humorously as a casual farewell. Have a wonderful time in Paris, Colin! Remember to write! A: "I'd better get going, thanks for having me!" B: "No problem. Remember to write!"
Remember to write,
and Don't forget to write. 1. Lit. a final parting comment made to remind someone going on a journey to write to those remaining at home. Alice: Bye. Mary: Good-bye, Alice. Remember to write. Alice: I will. Bye. Sally: Remember to write! Fred: I will!
2. Fig. a parting comment made to someone in place of a regular good-bye. (Jocular.) John: See you tomorrow. Bye. Jane: See you. Remember to write. John: Okay. See you after lunch. Jane: Yeah. Bye. Remember to write.