I will order the modification of a script with advertisements (Zend framework)

I will order the modification of a script written in the Zend framework.

Scope of work.

1) The possibility for the Contractor to be able to respond to the ad without logging in (for those who are willing, logging in remains as an option).

1a) Quick reply format: email, free text, phone optional (simple, like it used to be on Gumtree)

1b) In the wake of the response, email notification to the non-logged-in (and logged-in) Contractor as to what ad he answered.

By the way, the advertiser could be notified by email that someone has responded to his ad - if that's not a hassle.

It seems to me that since someone responds without logging in, there must be some trace left of what they responded to in the first place,

so by email will probably be the easiest way.