My Son's Birthday is the end of August and he will be having a party but I know people forget and lose invites etc over the 6 week holidays so would I be unreasonable to write something like this on the back of the invites...?
Hi. Could you text me with your number soon as I know it is a while away until the party and we won't see you through the summer so I will be texting everyone a week or so before the party to confirm details and remind everyone about the party.
Thanks!