Please add postcode space checker for integrated orders.
The post codes are entered within Etsy by the customer and some of them don't add a space SK115LZ instead of SK11 5LZ. The orders are then integrated with this mistake.
These customer orders are delayed within the RM system and I invariably have to refund their order due to late delivery. Then I have to refund my order with the Royal Mail software.

The space checker could flag this or ideally see the error and add a space