Mail a Letter Online

I like the idea!

I used a service similar to this in 2011 after I moved back from Australia to UK. Australian banks charge a monthly fee if you don't deposit your salary into the account so after a few months I realized my now-defunct Australian current account was very close to $0 (I had left a few dollars in there when I left). I emailed them and asked them to close the account to which they replied I needed to send a snail-mail letter - I used a service like this (with scanned signature no-less) to do so because it was easier than sending my own international letter to them. I got an email back saying they needed me to send a real letter with a real signature. I replied saying they could keep my account open but I wouldn't be paying for any fees, the reply was swift "Your account is now closed".

https://lob.com probably has what you're looking for. I've used their service for awhile and it's amazing.

I wonder if they've done some testing to compare designs.

A site that looks like it's designed in the 90s is probably highly attractive for many users. This "Mail A Letter Online" site, if compared to a 2019-looking snazzy SPA "smail.io" Bootstrap site and mobile app, probably wouldn't do as well for some audiences. But if their target demographic likes this style better, then this site is what they should be using.

Also, nothing prevents them from also starting up Photoshop and designing a snazzier sister site that's fulfilled through the same physical service.