Yours to give

Both sentences are correct.

It is not mine to give. = I don't own this thing, so I can't give it to anyone. (refers to physical objects)

It is not for me to give. = It's not my job or responsibility to give things like advice or direction to someone. (refers to nonphysical things and is similar to ''It's not up to me to give.'')
It is not (for me)(up to me) to give

Debpriya Deother constructions with the possessives

Think of these constructions as special idioms. They occur after linking verbs.

It is (not) -- [mine/yours/his] to give.
____________


The "normal" use spoken of in your grammar books is most likely the for ... to ... constructions that occur after certain ad

"It is important for you to be here on time."

This is a cleft sentence, but my original sentence was not meant as a cleft sentence.
It was like "That is not for me to give", except I used "it" instead of "that".
Even the other sentence was meant to be like "That is not mine to give". The "it" was not an anticipatory "it".

Debpriya DeThis is a cleft sentence

The sentence contains anticipatory "it", but it is not a cleft sentence. Cleft sentences are of the form

It is [ ] that ... as in It is [the key to the front door] that I lost.

The highlighted element (within [ ] ) is most often a noun phrase.

I am also aware that t