If your recipient tells you that he/she did not receive a consent request from Pronotif, ask him/her to check his/her junk mail, as the consent request may be there.
Secondly, check your proof of consent report that you sent to this person to see if the consent request was indeed sent. If it was not, you may have made an error in their email address. In this case, you will have the opportunity to change the email address and resend the previously sent consent request.
Finally, you will always have the possibility to ask your recipient to send you a new email address so that you can send the consent request via this new email address.