A simple authorisation letter may do you good, Or, an authorisation notice that you may copy from someone's website can also be helpful. However, these three (3) authorising a representative communications had assisted so many taxpayers and had been proven effective in fighting the BIR's graft and corruption and more importantly, had overpowered the so-called 'estoppel' doctrine. Buy it now. Thanks.
He has over 30 years of experience in the field of deficiency-tax-assessment reduction and taxpayers'-rights protection; pioneered the use of tax-basis financial reporting; thwarted many unjustly attempts of many BIR-officers to collect billions of pesos from many taxpayers; assisted thousands of entrepreneurs to comply with the rigid and complex BIR-regulations; and, mentored many start-up accountants, bookkeepers and consultants. He also authored many taxation books. He aims to elevate the professional and integrity standards in the field of accounting and taxation.