The recommended procedure is to perform a "secure erase". The process will erase all data on the ssd, make it like new, and prepare it for reuse. Some ssd's include a free toolkit utility which includes secure erase:
Intel Solid State Toolbox
Corsair SSD Toolbox
SanDisk SSD Toolbox
Samsung Magician Software
OCZ Toolbox
In addition there are third party utilities which can be used like Parted Magic:
https://partedmagic.com/
Formatting is not recommended other than a Windows "low level format" for an ssd that will be used as a secondary data drive.