Unable to add online payee
Having been offered the only two possible options (and one of those offered options may not address the issue), the user insists on that there must be another way to do what he wants. There is NO such other way.
Once an online payee has been deleted in Quicken, it can NEVER be re-added. To be more specific: the combination of online payee name and online payee account number can NEVER be re-added.
When a user tries to re-add an online payee with the same name and account number as a deleted online payee, Quicken presents a fairly easy to understand 3 sentence message ... to quote:
"The combination of payee name and account number you have entered already exists (*).
"To create a new payee click OK and change either the payee name or account number. ...."
[The final sentence in the message can be ignored in the case of trying to re-add a deleted payee, so I have not posted that sentence.]The original poster in the linked discussion has the two possibilities offered by Quicken: use a different payee name or a different payee account number. Since the op is attempting to re-add the same payee, using a different account number would appear not to be a possibility. So a different name must be used.
Contrary to the original poster's claim; the new online payee name is not limited to having different text in the Online Payee "Name" field (though that would work). By entering text in the Online Payee optional "Description" field (text not used with the deleted payee), will effectively create a NEW (unique) online payee name. {An online payee name is the combination of the "Name" field text plus the "Description" field text (where the Description field text will be enclosed - by Quicken - in curly braces).
When the "New" online payee button is clicked, and the user keys the name of a deleted online payee in the "Name" field, Quicken will present all the info from the deleted online payee. Making it a trivial matter to either key text in the "Description" field that makes the combination of Name/Description unique, or to key a new text in the "Account number" field (a different account number than the deleted online payee had).
The original poster says, "Changing the description (part inside curly braces) doesn?t work". Strange the op uses the word "changing", since typically there was no text in the deleted online payee Description field.
I have done this many times in many Quicken versions/releases: it has worked every time. And it doesn't matter whether the payee you're trying to add has been deleted or not. You can use the technique offered by Quicken to add another online payee with the same "Name" text and "Account number" text as an existing - never deleted - online paye, by just giving the "New" payee some text in the "Description" field that makes the combination of Name and Description unique.
[(*) The fact that the user can not see the deleted online payee when viewing the Online Payee LIST is intentional ... it is, after all, deleted. But that deleted online payee info will be visible if/when the user initiates the "New" online payee dialog for that specific (deleted) online payee Name. At that point the user can elect to re-add the deleted payee (by following the stated rules for doing so), or to leave the deleted payee, deleted.][NOTE: Any text in the online payee "Description" field (text which will be enclosed in curly braces) will NOT appear on any checks written to the online payee (or, I believe, in any online transaction for that payee, such as an ACH transaction).]
[NOTE2: User GeoffG suggested "First remove the payee on the bank side and see if you are able to re-add in Quicken". The original poster took that too literally. When you delete an online payee in Quicken, then do a One Step Update (or Update Now), the online payee will be deleted from the bill payer's web site. So instead of trying to DELETE then ADD the payee at the billpayer's web site, the original poster could have tried to just ADD the payee at the bill payer's web site (why that wasn't obvious to the op, I have no idea). I have not tried that, though I'm guessing it won't work; but the op could have tried "adding" the online payee at the bill payer's web site, then doing a One Step Update in Quicken. I suggest anyone wanting to try that should make a Quicken backup before trying.]