CAS research has revealed many Scots face 30 to 50 per cent delivery surcharges.
Argyll and Bute's SNP MSP Michael Russell is supporting MSP Richard Lochhead's Fair Delivery Charges campaign presented in the Scottish parliament last week.
Mr Russell said: 'It is extremely unfair that some of the most loyal online shoppers in Argyll and Bute and across rural Scotland are the ones facing location discrimination and having to pay a postcode penalty to get their items delivered this Christmas.
'CAS’s research shows that many businesses and families in Scotland are being charged an average of nearly £19 extra when buying goods online.'
'Hopefully the campaign will force retailers to stop this discrimination and adopt set standards for deliveries to each and every corner of the UK, not least Argyll and Bute.'
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