From their perspective, you've suddenly invoiced them an extra 17.5% that they need to account for in their VAT calculations.
Send them a copy of the VAT certificate, and they should pay up. It's not worth fighting over, to be honest. It's not worth asking them for their VAT certificate - you aren't charging them VAT, so why would getting theirs be relevant?
Send them a copy of the VAT certificate, and they should pay up. It's not worth fighting over, to be honest. It's not worth asking them for their VAT certificate - you aren't charging them VAT, so why would getting theirs be relevant?

Hence the
Comment