Welham offers for the PFRPG a minor magical item that fills this need perfectly. Badges of Faith are items worn about the neck (=magic item slot) that grant a passive power to the wearer once they perform what amounts an act appropriate to the religious nature of the badge to "actualize" the power. A further act of piety -- the completion of a clerically imposed quest -- "invests" the bearer of the badge with the fullness of its power. (Cleric also have further possible benefits from badges of faith.) Finally, the benefits of the badge stands beholden to not transgress a specific prohibition which will result in the permanent loss of access to the badge's power and the bestowal of a curse as divine punishment.
The mechanical benefits of these badges makes them appropriate to many different domains and deities, thus offering the wearer with an interesting variety of magical assistance. This deserves to be highlighted: The badges follow the design principle of making loot part of the game's plot. The GM who adopts badges into his or her game is not only giving players a new kind of magic to enjoy, but gaining a spur to future play, encouraging certain actions in play and discouraging others. With 30 badges to chose from, chances are good that you will find a badge to fit the needs of your campaign and your characters, but even if the perfect badge is not here for you, these examples herein will provide the necessary guidance for you to design a custom badge.
A couple of notes about the physical design of the pdf: there are a few places where line breaks or extra-spacing would make for easier reading: mostly a design issue, but at least in one spot an editorial one. I find the font that is used for headings to be unclear and hard to read when used at the size found in individual badge names. I am a fan of the use of old, public domain art in pdfs, and I think that most of the choices here in BoF are good, though a few probably could have been improved with more searching of old book archives. A final picayune problem: putting a number sign in front of the title gives the impression that this pdf is a number in a series (i.e., Number 30 in Rite Publishing's line of Awesome Artefacts!), when the title is simply indicating that there are 30 badges and the series is "30 [such-and-suches]". The author is to be congratulated on the thought and imagination that went into the work. A worthy addition to the PF gaming table.
[4 of 5 Stars!]