Harmoney only have to Sunday to provide the tax certificates

"Whichever form you use, you must give this information to the recipient by:

20 May (for an end-of-year notice), or
the 20th of the following month if you are ceasing to be a payer, or
within 20 days of when a recipient requests it (in any other case)."

http://www.ird.govt.nz/rwt/deducting...tificates.html

Also does this wording mean that if we make a request for the certificate on the 10th of April that they would have to provide it by the 30th of April? instead of 20th of May?