Re: EmmerdaleWe didn't see a letter addressed to her, only a form stating the percentage of the person named being the parent. He had to have doctored the communication in some way, maybe copying the heading, signature etc. or even maybe typing out a completely different letter, leaving behind whatever they'd sent!
Re: EmmerdaleVanessa's baby IS Kirin's, and that's not a spoiler. We saw Rakesh stealing the DNA letter of confirmation which showed that Adam was not the father, but Rakesh stole the letter and somehow doctored it, then pushed it back through Vanessa's letter box in its original envelope.