* 3rd-quarter EPS $0.45 vs $0.38 last year * Sees full-year GAAP EPS $1.60-$1.63 * Sees full-year non-GAAP EPS $1.65-$1.68 Oct 30 (Reuters) - Western Union Co, the world's largest payment transfer company, cut its full-year forecast as rising competition and weak markets weigh on its business. ``Business was challenging, as soft global economic conditions, compliance related changes, and competitive pressures in certain money transfer corridors impacted revenues,'' Chief Executive Hikmet Ersek said in a statement. The company said it was planning to cut costs and save $30 million annually by 2014.