Thank Papa very much for the P.O.O. which I got cashed without difficulty. 1856 June 28, John Addington Symonds, letter in Letters, Vol. I, p. 75
A Coupon will be found below, which will be redeemed if accompanied by P.O.O. for 1s. 6d or 20 stamps. 1877, Army and Navy Gazette - Volume 18, page 192:
... it is customary after the bargain is made for the purchaser to send a P.O.O. for the amount before the birds are sent off. 2013, R. L. Wallace, The Canary Book, →ISBN: