What about retailers?
Provided I have a system so that I don’t pay a post-dated cheque into my account, is it OK to accept a post-dated cheque or series of post-dated cheques backed by a cheque guarantee card until the due date?
No, you should never accept a post-dated cheque or a series of post-dated cheques backed by a cheque guarantee card. This would be outside the conditions of use of the cheque guarantee card scheme, which state that the cheque must be dated with the actual date of issue.