Payments
![Can you use Direct Debit for one-off payments?](https://images.ctfassets.net/40w0m41bmydz/5imfEUKwddLxIdCGDtwKGS/926628cf2a747f221ab652bb945b41a8/guides_images_post-thumbnails_dd.jpg?w=634&h=374&fl=progressive&q=50&fm=jpg)
We still don’t recommend using Direct Debit for instant payments like e-commerce but Direct Debit is a safe, easy and inexpensive way to collect one-off payments.
![Modulus checking: what is it?](https://images.ctfassets.net/40w0m41bmydz/6cly85aQ9dVoNnnoMMk4yy/829cda3046e4c6d24fa7fa8423d21efe/guides_images_post-thumbnails_choice.jpg?w=634&h=374&fl=progressive&q=50&fm=jpg)
Learn about this procedure for validating sort code and account number combos.
![ADDACs messages and changes to your Direct Debit mandates](https://images.ctfassets.net/40w0m41bmydz/1aYFAZ0ab45unDKKLMzLgD/d386add60697ae895aa8f288a3abc212/guides_images_post-thumbnails_onlinepayments.jpg?w=680&h=401&fl=progressive&q=50&fm=jpg)
ADDACS messages are the messages you receive from your customer’s bank if a mandate has been cancelled or amended by your customer.
![AUDDIS Messages: Having problems setting up your mandates?](https://images.ctfassets.net/40w0m41bmydz/MMNZJQZPnaDmiN8TlKfda/abe2e97f3ce848b0f6f6c1a411184cb6/guides_images_post-thumbnails_messages.jpg?w=634&h=374&fl=progressive&q=50&fm=jpg)
An AUDDIS report is triggered when there is a problem during mandate setup. We thought it might be useful to explain some common pitfalls and how you can avoid or resolve them.
![ARUDD messages: The two most common reasons your payments are failing](https://images.ctfassets.net/40w0m41bmydz/MMNZJQZPnaDmiN8TlKfda/abe2e97f3ce848b0f6f6c1a411184cb6/guides_images_post-thumbnails_messages.jpg?w=634&h=374&fl=progressive&q=50&fm=jpg)
An ARUDD report is triggered when a payment fails. In this article, we explain the two most common reasons for payments failing and how you can avoid or resolve them.
![Cancelling Direct debit payments - what merchants and payers need to know](https://images.ctfassets.net/40w0m41bmydz/5imfEUKwddLxIdCGDtwKGS/926628cf2a747f221ab652bb945b41a8/guides_images_post-thumbnails_dd.jpg?w=634&h=374&fl=progressive&q=50&fm=jpg)
The ability to instantly cancel a Direct Debit instruction is an important right for your customers.
![Advance Notice: Are you doing it right?](https://images.ctfassets.net/40w0m41bmydz/6cqPoZMABiVUMz622hCwmU/4de8009ff095f2afe18ae7b5af90bb85/guides_images_post-thumbnails_timing.jpg?w=317&h=187&fl=progressive&q=50&fm=jpg)
Keep on top of advance notice with six quick questions to<br>ask yourself