Never heard of someone in your position making an unofficial deal.
Upon Andrew Jackson's election to the presidency, the Telegraph became the principal mouthpiece of the administration, and received printing patronage estimated in value at $50,000 a year, while Green became one of the coterie of unofficial advisers of Jackson known as the "Kitchen Cabinet."
After wandering for many months, chiefly in Persia, and having abandoned his intention of proceeding to Ceylon, he returned in 1842 to Constantinople, where he made the acquaintance of Sir Stratford Canning, the British ambassador, who employed him in various unofficial diplomatic missions in European Turkey.
For that purpose Delessart sent Talleyrand, well known for his Anglophil tendencies, to London, but in the unofficial or semiofficial capacity which was rendered necessary by the decree of the Constituent Assembly referred to above.
The most important unofficial contemporary works are the Histories of John Knox, Bishop John Lesley, George Buchanan, and Robert Lindsay of Pitscottie; the Diurnal of Remarkable Occurrents from the death of James IV.