verb forms - "read and accepted" or "read and accept"?

Is this phrase correct?

By purchasing this product, you certify that you have read and accepted the Privacy Policy and Terms and Conditions...

Is it just me or it feels like "read and accepted" should be "read and accept" only, or is it already grammatically valid?

Answer

The word have in the phrase suggests that the action has already been taken, ie it is in the past. Therefore, the verbs indicate past tense: you have already read (pronounced 'red') and accepted the conditions.

If the have wasn't there, then that clause in the sentence would be saying that you will (but haven't yet) read (pronounced reed) and accept the conditions.

So, the statement is grammatically correct. It deals with tenses a bit awkwardly, but it is valid.