If I receive the money in my hand, can I use an invoice as receipt?

If I receive the money in my hand, can I use an invoice as receipt?
If yes, how? Thanks!

Mark invoice paid as cash

Thank you!
More exactly, how?

Go to relevant invoice , log payment, tick option paid in full, pick cash from drop down menu

Ok. Thank you so much!
And after that I can send the invoice to the client?

while you logging payment you can tick option “email receipt to client”

This can be considerated a receipt? …or I have to resend the invoice paid in full?
Thank you!

"Dear Name

Thank you for the recent payment you have made to us for the sum of £ 20.00. I hereby acknowledge receipt of payment which has been set against invoice #000002, dated 18/04/2014.

If I can be of any further assistance, please do not hesitate to contact me.

Kind Regards
Silu Design Studio"

"A payment #SP000001 has been attributed to this invoice"

Why I can’t send “PAYMENT” document as receipt?

Invoice would be marked PAID plus an email confirmation of payment as well. also your client can login to client area to see all invoices as well

Thank you for the answer!
Unfortunately I can’t see the date of payment only on PAYMENT document.
Payment Date is not important for the customer/company?

payment date would be different in your record from what customer have in theirs so not really important