Enforced usage of amazon shipping

i have received email stating that as of end of march we have to get our shipping via amazon we have always used stamps for standard shipping (large letter) 100g is this correct and if so how does this work as when i try it comes up parcels

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 i have received email stating that as of end of march we have to get our shipping via amazon we have always used stamps for standard shipping (large letter) 100g 
 is this correct and if so how does this work as when i try it comes up parcels
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 3 posts were merged into an existing topic: <a href="/forums/t/upcoming-changes-to-valid-tracking-rate-for-royal-mail-stamps-and-franking/577917">Upcoming changes to valid tracking rate for Royal Mail stamps and franking</a>
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Enforced usage of amazon shipping

1 reply

Julia_Amzn