Okay, I'm a bit confused about how the information in the above posts would apply to my situation. I've got a reservation IAD-SJO for two tickets at the end of December. According to Taca and the GP website, this reservation has already been ticketed, although I have not received these tickets yet. I would like to change it, with first choice being BOS-SJO on earlier dates. If not possible, second choice would be the original route IAD-SJO but on earlier dates.
I called Taca and the rep said he could change both my origin and dates over the phone no problem but that I'd have to visit a Taca ticket office in person to change over the paper tickets and pay the $35. (I'm not in DC or BOS now but he said I could go to the BOS office the day before travel and do this). But after re-reading Customer Care's post, I'm nervous if it would actually work out that way or not. What should I do? Any advice would be greatly appreciated!