Vast majority of house sales involve at least one of * an estate agent * a mortgage company (on the purchase or the sale) * involve a sale at a market rate

Vast majority of house sales involve at least one of * an estate agent * a mortgage company (on the purchase or the sale) * involve a sale at a market rate * involve parties that know each other personally (family etc). To not have any of those surely should raise a warning flag that "this requires a little more investigation" than a forged driving license. This wasn't an abandoned house being sold after being empty for several years.