Today I was called in the middle of a game for and illegal serve. My opponent said you cannot toss the ball up on the serve and spin it off your paddle. I do toss the ball up on my serve it do not put spin with the paddle. ( I tried it when it was legal never could figure it out) Anyway this what I found.
Yes, you can toss the ball slightly on a volley serve but not on a drop serve. The toss is legal as long as you don't impart spin and the serve still meets all other requirements, such as hitting the ball below the waist with an upward stroke and the paddle head below the wrist. For a drop serve, the ball cannot be propelled or tossed up in any way; it must be dropped and can bounce on the ground before being hit.
Volley serve
Tossing is legal: You can toss the ball upward on a volley serve

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