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If you have a deposit for sending tips, you can withdraw it.

However can I also tipu a content on hive now?

Yes :)

Hello there, can you help me? I undelegate SP from tipU (i want to delegate it to tipU in hive), but my SP is not return yet, can you tell me why? Thank you !

delegations of SP (and HP) have always taken 5 days to return. That is just how delegation works on steem (and now hive). There is a 5 day cooldown period before you get your delegation back.

I miss that. Thank you ! Now everything is fine.