Student or Learner
I am going to write to our sponsor's media agency sending them invoice against the ad placed & requesting them to release payment asap.please correct my attempt
It was nice talking to you.
As communicated by MR XYZ (Sponsor Company Name) & reference to our conversation about Company contribution for our foundation by sponsoring supplement ad, please find attached soft copy of invoice for the same. Hard copy will also be sent to you separately.