Offer, acceptance, two wrongs, but is anyone right?

[4x4Tyke]

You stuck between a rock and a hard place, neither is likely to be happy to take a hit and you are likely to take at least some of the flak unless you can ensure there is a perception of a mutually beneficial situation in the longer term.

As a mediated solution I would probably suggest something along the lines of the first item is paid as invoiced and the client confirms the order for following item at the higher price.

I would also reminded them if either take this legal, their costs will likely quickly eclipse the £1500 disagreement.

[mondeoman]

Tell em to split the difference or leave you out of it.

[voicey]

mondeoman said:

Tell em to split the difference or leave you out of it.

This really. Regardless of who is legally in the right both have made a mistake and have put you in an awkward position with the potential to damage your relationship with them.

I used to deal with disputes of trading contracts made by my team - I'd listen to the call and then speak to my opposite number at the other bank (who had done the same). Many times errors were made by both sides and we'd just split the loss. It's the pragmatic thing to do and means that the relationship can continue.