The two businesses discovered hackers had changed the online value of their goods to 1p before trying to buy the items – which included £2000 of furniture - with a stolen credit card.
On both occasions, the companies spotted the scam and prevented any losses.
Police launched an investigation after receiving a call from Action Fraud and officers are urging businesses to ensure their online security is up to date.
Detective Constable Tony McClements, of Lancashire Constabulary’s economic crime unit, said: “I urge all businesses to make sure their IT security systems are updated and meet their requirements.
“Hacking in this format is a comparatively old method of defrauding businesses, but has begun to rear its ugly head again. I would suggest businesses put additional checks into place before goods are despatched.”
• For further advice and information please visit www.actionfraud.police.uk or call their free telephone service on 0300 123 2040.