Hi there, 

Having the ability to add signatures when printing cheques can be a great feature for businesses that are on the go. QuickBooks Online makes it easy to print cheques and I'll be happy to show you how. 

At this time, there isn't an option to add signatures to your cheques. Having this feature would be great and I encourage you to send this as feedback to our engineers by clicking the Gear icon and looking for Feedback. If you'd like to print cheques, click the New + menu > click on Print cheques. Here you can set up the way you'd like to print your cheques. I encourage you to check out this helpful article with more info on how to: Print a cheque in QuickBooks Online. Regarding the EFT payment option, that method of payment isn't available yet and you're more than welcome to send feedback about that to our engineers as well. 

When you get a chance, feel free to check out our product tutorials using this link here. The tutorials do a great job at explaining some of the awesome features offered in the program and how you can use them. 

Let me know if his info helps. I'll be on standby.