the assurance feat how does it work?

do you have to call out I'm using assurance or does it always stop you from rolling below a 10?
aka reliable talent from d&d5e

also does this prevent nat1s from ever happening?

really need an official answer on how it works. thanks for all answer's

Choose a skill you’re trained in. You can forgo rolling a skill check for that skill to instead receive a result of 10 + your proficiency bonus (do not apply any other bonuses, penalties, or modifiers).

You choose to use it instead of rolling.

core rulebook pg. 258 wrote:

Choose a skill you’re trained in. You can forgo rolling a skill check for that skill to instead receive a result of 10 + your proficiency bonus (do not apply any other bonuses, penalties, or modifiers).

You choose to use it instead of rolling.

thanks!

Also, when you choose to use it it doesn't make you roll a 10. It makes the result of the check 10 + your proficiency bonus. This is notably different as, just like the text in the parenthesis says, you don't apply any bonuses, penalties or modifiers (which includes ability score modifiers, btw).

Also, when you choose to use it it doesn't make you roll a 10. It makes the result of the check 10 + your proficiency bonus. This is notably different as, just like the text in the parenthesis says, you don't apply any bonuses, penalties or modifiers (which includes ability score modifiers, btw).

Quite right. For example, if you were a 7th-level fighter with 18 strength and were a Master in Athletics, Assurance would always give a total result of 23.

base 10 + level 7 + 6 master proficiency = 23 total check result

It would be the same result if said fighter only had 8 Strength.

So it's good when heavily penalized or for getting past mundane obstacles w/o risk of rolling a nat one, yet less useful when you're already heavily invested in an ability.
Unless you really need that ability to work, i.e. Swashbuckler w/ their Panache skill. It's not that Assurance will help you much getting the roll you need, it's that it's a Fortune effect and thus counters any negative Fortune effects, letting you roll normally instead of for example taking the lowest of two rolls.

Another use case is for Assurance (Athletics) being used on third actions to trip/grapple/shove weaker opponents without getting MAP. It will usually be enough to succeed against the low save of a creature one level lower, and sometimes against a same-level creature (levels 3-5, 7-10, and 15), assuming maxed Athletics.

Another use case is for Assurance (Athletics) being used on third actions to trip/grapple/shove weaker opponents without getting MAP. It will usually be enough to succeed against the low save of a creature one level lower, and sometimes against a same-level creature (levels 3-5, 7-10, and 15).

And if you have an awful str. ;)