I have forgotten my password to unlock an older iPad (which I am selling). What should I do?

I would not sell this old, nearly 10-year old iPad to anyone, unless you sell this device as parts.

That iPad model cannot ever upgrade beyond iOS 9.3.5/9.3.6.

That nearly 10-year old, iPad 2 model is too old, now.

Apple ended support for 8-10 year old iPads, at least, over 3 years, ago.

The internal hardware in that iPad is too old, too underpowred and completely incompatible with all later versions of iOS/iPadOS.

Virtually, all third party iOS app developers ended/stopped/abandoned supporting these old iPads over two years, ago.

There are virtually, NO MORE older iOS 9 or 10 compatible apps available from the Apple iOS App Store, any longer.

There are NO MORE popular, useful apps or games for these old iPads, any longer!

Especially games as game makers push for upgrade compatibility for best interactive user and cross device gameplay.

AND, that over 4-year old default iOS Safari Web browser is too old, not secure and not safe to use to access the Internet, any longer.

There are virtually NO MORE third party Web browsers left for 8-10 year old iPads!

That iPad will be virtually useless to anyone you try and sell this to, IF you sell this iPad as a viable, useable device.

My opinion, but you really should recycle this device with Apple.

That old iPad will be virtually useless to anyone.

Here is how to erase that data off of that old iPad.

If you forgot your Apple ID password - Apple Support

Sorry.

MichelPM: A caveat for you. I know you do not like replies to things you have said when they are not in direct response to you, but this content is directly connected to your comment about erasing data. I suspect you intended to post a link to this article but I do not see it at the time of writing this). My first post was a direct reply to the OP's question about getting access to a device and therefore a different subject from one advising discarding it:

Connie M.:

This support article discusses what you should do before disposing of an iOS device:

What to do before selling or giving away your iPhone, iPad, or iPod touch [or if you received one that had not been erased] - "Use these steps to remove your personal information from a device, even if you don't have it anymore." --> https://support.apple.com/HT201351

If you mean passcode see the Related Article link at the top left.

If you mean Apple ID password:

"If you forgot your Apple ID password" click here --> https://support.apple.com/HT201487

Yeah,

I forgot to post that link.

Thank You.