Its just a silly version of saying pig, something we would say to a kid, makes it sound like a cuter version, if a pig can be cute. Not sure where it came from, another of those things we say without realising if everybody else does. Our family does say a lot of silly things. Doblerdogs for dobermans, girafacans for giraffes, effalumpets for elephants. My whole family now call google goofle after me and an online friend had a few funny spelling mistakes. We have silly names for each other. we're a bit odd really. ?What is a piggy jack ? Is that an up north saying ? . Nearly as cute as little mint balls . I didn’t have to show post office Lpa, really it was scarily easily , just filled out her date of birth and address and new address and that was it . The box idea suggested by @samluvit is a good idea too .
Maybe if do decide to try redirection I'll do it online like you suggested if don't need lpa or signature on there x