If I issued a payment to a company, and I wanted them to notify me when receiving the payment, could I say 'please acknowledge the payment when receiving it?' Is the word 'acknowledge' alright to be used here?
The business language to be used is:
It is short and sweet, and to the point.
You do not have to say "when you receive payment" or any sort of auxiliary instruction. The phrase is understood by anyone who has run a business professionally, and that a "receipt" is to be issued to the payer.
It is like writing "RSVP", where you do not need to tell the person invited "please ...blah ... when you receive this invitation." Writing "RSVP" simply says, "Please respond" (in French).
Saying "... when you receive ..." is redundant.
However, I notice that when "professional businesses" write to mom & pop stores, they frequently write (in a style similar to),
Alternatively, they go a step further
BTW, "self-addressed envelope"? Can an envelope address itself? Seems illogical to me.