Can anyone help me regarding asking my previous client/s for new jobs. Is that OK with Fiverr.com TOS?
No, you cannot. That would be spam. Your previous buyers will contact you if they want to order from you again.
OK. Thank you so much.
added to what @vibronx said.
You will also be getting a warning for that and my be even get your account restricted
Ok. Thanks a lot for your advice.
Don’t ever ask your buyer for these things:
give you review
give you additional tip
These are considered as violation of TOS of fiverr and you will get your account banned without any prior notice/warning